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From PearPC

This guide will allow you to connect to the internet in Mac OS X or PowerPC Linux Distrubutions by using a DHCP IP Address from an external router under Windows XP/Vista.


  1. For example, Apple recommends that 'if you're selling or giving away a Mac that is using OS X El Capitan or earlier, use Option-Command-R to make sure that the installation isn't associated with.
  2. How to Factory Reset Mac OS X to Original Default Factory Settings. If you want to completely erase the Mac and get a factory reset Mac OS X version that is blank and back to default settings as if the computer was brand new, this is the process to achieve that.
  3. It should work for almost Mac (iMac, Macbook, Mac mini) produced since about Mid-2010. For device produced arround Mid-2010 to Early 2011, you may have to update the EFI Firmware. There is all the detail here: Computers that can be upgraded to use OS X Internet Recovery.

Download CleanMyMac and launch it (you can do that for free here). Before you restore Mac to factory settings, be sure to sign out of iMessage. Here’s how to do that. You’ve reformatted your hard drive and now you can reinstall a clean Mac operating system. Simply click Reinstall macOS or Reinstall OS X. Confirm that you.

  • You must be running Microsoft Windows XP or Microsoft Windows Vista to use Network Bridging.
  • Your PC must not be running the Internet Connection Sharing (ICS) service. Note: It is now possible to use Internet Connection Sharing together with Network Bridging. For more information, please read the article Network Bridging and ICS for Windows XP/Vista.
  • Your PC or Local Area Network (LAN) must be connected to an External Router that provides a DHCP IP addressing service.
  • The most recent OpenVPN Version.

Installing the OpenVPN Tap Interace

Open the OpenVPN application, and deselect all other options apart from the Tap-Win32 Virtual Ethernet Adapter in the installation menu. If a notice about Windows Driver Signing appears during the installation, click Continue Anyway.

After the installation, a new LAN connection will be installed. It will be named something like 'Local Area Connection 2', but you can rename it to anything you like if you so desire.

Creating the Network Bridge

a) In Windows, open Control Panel, and navigate to Network Connections.

b) Hold down the Ctrl (Control) key on your keyboard, and select both your real LAN connection, and the recently installed Tap-Adapter (called something like 'Local Area Network 2' if you decided not to rename it). Right-click the Tap-Adapter and select the 'Bridge Connections' option.

Wait a few moments and a Network Bridge should be created and activated by Windows. It should be assigned an IP address from your router. If not, check to see that the router has:

i) recognised a new MAC address connecting to it.

ii) a MAC Address Filtering service functioning.

iii) a DHCP IP addressing service enabled.

Configuring the OpenVPN Tap Adapter

a) Open Network Connections as instructed in the previous step. See 'Creating the Network Bridge' (above) for the specific instructions.

b) Right-click the Tap-Adapter (making sure not to touch the Network Bridge), and select 'Remove from Bridge'. Do not configure any options for the Tap-Adapter or Network Bridge.

You should be left with your real LAN connection(s), a Network Bridge, and the Tap-Adapter.

Enabling the Realtek 8139 Network Card

a) Open your PearPC Configuration file.

b) Make sure the following lines are present:

c) Save your configuration file, and close the window.

Note: Mac OS X 10.2 users cannot use use the Realtek 8139 network card. You must use the 3Com 3c90x network card instead. Make sure the following appears in your configuration file:

Troubleshooting: if you get an 'Opening TAP connection failed' error, it's because the Windows user running PearPC doesn't have enough privileges to enable the network adapter. You must run PearPC as an Administrator (either using Run as.. or by loggin in with an admin user). If you don't have access to an admin account, consider asking your admin to install OpenVPN as a service and enable it for your user.

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Starting PearPC and Establishing the Network Bridge

a) Start PearPC via the command line, PearPC.net Package, shortcut, or any other method.

b) Once the client OS (Mac OS X or a PowerPC Linux Distrubution) is displaying the final coloured desktop background (the desktop in Linux, the Finder in Mac OS X), add the Tap-Adapter to the Network Bridge.

Note: Whenever you start PearPC, you will need to add the Tap-Adapter to the Network Bridge. Currently, there is no way to have the Tap-Adapter automatically join the Network Bridge when PearPC is started.

Setting up Mac OS X

Note: Mac OS X 10.2 users must install drivers for the 3Com 3c90x network card before continuing with this tutorial. It is recommended that you use the 'Easy Install Kext Package' from [email protected]

a) Open System Preferences, and click the Network icon.

b) If a window is displayed and says that a new port has been detected, click OK, and then Apply Now. If a window is not displayed, do not worry. Networking can function perfectly using the Built-in Ethernet device.

c) Open the properties of the installed network card (either the detected NIC or Built-in Ethernet device). Check that the IP address displayed is the same as your LAN IP settings. If it is not, and the address displayed is in the range of 169.254.*.*, then click the 'Renew DHCP Release' button. Your LAN IP address should now appear, and remain the same everytime you start Mac OS X.

d) Open the main drive shown on the Finder desktop and open the Applications folder. Now open the Utilities folder, and select 'Directory Access'. Click the lock to make changes (you need to enter your Mac OS X password here). Hightlight SMB, and select Configure. Set your LAN workgroup here. Press OK, click the lock to prevent unauthorised access, and close all open windows.

e) Open System Preferences, and select the Sharing button. In the 'Computer Name' box, change this to something shorter, like 'Panther' (without quotes). Note: This step is optional, but necessary if you want to access Mac OS X Shared folders from Windows.

Connecting to the Internet

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If you have successly completed the steps listed above, then the rest is simple.

Open Safari or whatever browser you choose to use. The Apple site should immediately begin to load its startup page.


i) Disable any firewalls and check to see if the connection now works. If yes, then create the appropriate firewall rules. Check by restarting PearPC.

ii) Is the IP address of the client within your LAN? After first-time configuration, this should remain the same. If not, click the 'Renew DHCP Release' button.

iii) Check your console output. If it shows

disable your firewall for the time being and restart PearPC, making sure to add the Tap-Adapter when you see the final desktop background appear. If you are able to access your LAN and/or the internet, enable your firewall, and create the appropriate firewall rules.

PearPC and Network Bridging Procedures

After you have finished with PearPC, remember to remove the Tap-Adapter from the Network Bridge, otherwise networking will not be functional when you start PearPC later on.

Connecting to Windows from Mac OS X

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a) Open System Preferences, and then select the Sharing button.

b) In the Services tab, tick the box for 'Personal File Sharing' and 'Windows Sharing'.

c) Close the System Preferences window, and return to the Finder (desktop) screen.

d) Select Go from the Finder desktop screen, and choose Network. A window should appear, listing all computers on your LAN. If this occurs, select one of the computer LAN icons and skip ahead to part g). If no computers are listed, continue to the next step, part e).

e) Select Go from the menu bar (Finder desktop screen), and then choose the 'Connect to Server' option.

f) In the Server Address box, type in:

If that does not work, try the following:

g) A new window should appear asking you for Network Identification Information. The hostname and workgroup/domain should already be entered for you. If it is not, add this information in the first and second boxes. Type your Windows password (if any) in the final box. If that is not accepted, simply leave the box blank.

Now select which Windows Share you would like to access. The share will have a shortcut displayed on the Finder desktop and in the network browser.

Connecting to Mac OS X from Windows

a) Start PearPC, making sure to bridge the Tap-Adapter when the desktop background appears.

b) Find out the Mac OS X IP address, if you do not already know it. To do this, open System Preferences, and click the Network button. The IP address is displayed in the text information.

c) In Windows, open My Network Places. From the left panel, select 'View Workgroup Computers'.

d) The Mac OS X computer should show up. Its hostname may be long or strange. This is due to the computer name being too many characters. To change this, edit the name in the Sharing section of System Preferences.

e) Select 'Add Network Place' from the left panel. Click Next, Choose Another Location, and type in your Mac OS X IP Address or Hostname, followed by your Mac OS X Username, and public folder name. You should have something like the following:

Note: Entering the hostname instead of the IP address may not work, depending on the Mac OS X Hostname. See part d) to fix this. You may also be asked for your Mac OS X Username and Password. Enter this information as required.

That's it - Now you can access Mac OS X from Windows.

Note: It may be quicker or easier to access Windows Shares from Mac OS X, as sometimes accessing Mac OS X Shared folders and files can cause issues.

(Last updated around January, 2009)


PearPC emulates a PPC Macintosh (G3 or G4) capable of booting Mac OS X, up to version 10.4 (Tiger).

Setting up the emulator is fun and easy! This is a setup guide for the special “redscorp” builds of PearPC, which is possibly faster and more feature-rich than other versions of the emulator. But before you begin installing, there are a few things that you need to assemble:

  • A copy of Mac OS X. You can use version 10.4 (Tiger) or earlier. You can use an OS X install DVD or CD, or a disk image that you've created or downloaded. The screenshots and instructions in this guide are of 10.4, although other versions are set up in a very similar way.
  • PearPC 0.5pr. This is the “redscorp” release of the emulator from March 29 of 2008. I have added the video driver and the (outdated) documentation from the official version to this archive. Check out this forum thread on PearPC.net for more information or to look for a newer build.
  • This guide uses a special version of the front-end PearPC Control Panel to set up the emulator.

Dealing with Mac OS X

It is much easier to install OS X on your emulated computer from an .ISO image, rather than from a physical OS X installation disk. In Windows, you can create an .ISO from your physical disk using something like MagicISO. If necessary, you can perhaps download a disk image somewhere. If you download a .TOAST image, just change the extension to .ISO. If you download a .DMG image, try using UltraISO to convert it to ISO.

Getting Started

Download PearPC and the control panel. Extract the emulator and the 6 GB disk image (the latter will take a while). Install the control panel.

Run the control panel. Select “New Configuration File” from the file menu. Click “continue” to begin the configuration setup wizard. On the first wizard screen, click on “browse” to locate your PearPC executable, which is contained in the redscorp archive. Redscorp offers four executables optimized for AMD and Intel processors, and one generic executable. Pick the one that best suits your processor. If you don't know which is best, perhaps consult Wikipedia's entries for SS2 (older processors) and SS3 (slightly newer processors). If you are still not sure which is best for you, maybe try the generic executable.

Your “Primary IDE device” will be the 6 GB disk image. Browse to and select it. The type should be “Hard Drive.”

Finally, assign some RAM to PearPC. The more, the better.

See figure one, below, for a look at this setup screen.

Figure One: Setting up PearPC

Click “continue” to move to the next screen. You don't need to change any of this right now. You might want to increase your resolution a bit, to make it easier to see the OS X installation screens (they might not scale down to fit a 640×480 screen). Make sure that the path to your video driver (video.x) is correct - it is located in the same directory as the redscorp executable. Note that setting a lower video redraw rate will give you smoother mouse movements, but a possibly slower emulation. Experiment with this at a later time if you find it necessary.

See figure two, below, for a look at this setup screen.

Figure Two: Still setting up PearPC

Click “finish” to move to the next screen. Give your configuration file a name and save it somewhere.

You will now be returned to the main control panel screen. You now need to identify your installation disk. Check “CD-ROM device is installed” and then “browse” to locate your ISO image. Finally, hit the green “play” button to boot the emulator.

Figure three: Selecting my installation disk image

Note: You must install your operating system onto the 6 GB disk image linked to at the beginning of the guide. The “create disk image” feature of the PearPC Control Panel will not create disk images that can be booted from. Booting from such a disk image will result in an ” invalid format (filesize isn't a multiple of 516096)” message.

Note: Occasionally, the PearPC Control Panel will return a “Runtime Error 76” and refuse to save or import any config files. If this happens, you must uninstall the control panel, delete the *.ini files remaining in the program directory (they are not removed by the uninstaller) and reinstall the control panel.

Installing Mac OS X

When the PROM boot-loader screen appears boot from the CD-ROM image (see figure four, below).

Figure four: Select the bootable partition

The OS X installer should start to boot. You will first be prompted to select a language. You will then see a splash screen looking something like figure five, below.

Figure five: Getting ready to install Mac OS X

If you are installing on to the bootable disk image linked to at the beginning of the guide, you will not need to partition it. Just follow the on-screen instructions to install OS X. Installation might take from thirty minutes to a couple of hours. to speed this up, you can do a “custom” install without foreign language files or extra printer drivers.

Figure seven: About to install OS X

Figure eight: OS X 10.4 (Tiger)


You're finished! If everything went according to plan, you should be looking at a desktop looking something like figure eight. If you need any help, we run a support forum.


Need to restore Mac to factory settings? Then read on — our guide will help you learn the steps to factory reset MacBook Pro or any other Mac computer just as of it was new.

Note: This guide is relevant to Mac Pro, iMac, MacBook, MacBook Pro, and MacBook Air.

How to wipe MacBook Pro without losing data

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When you reset Mac, all the information you have on your hard drive is wiped off. That’s why you need to create a backup to save your important files and data. This is like cloning your hard drive and keeping it for some time.

You can manually back up all your files and apps by copying everything to an external drive or iCloud. However, the faster and more secure way to back up your Mac is Time Machine — the Mac’s built-in software. It allows to recover individual files and restore your whole hard drive in the event of a catastrophe.

However, before you use Time Machine, make sure to clean up your Mac. You don’t want to back up all the junk it contains, do you? Plus, a backup will go faster and more smoothly if your Mac is not cluttered. For a quick cleanup, you can use a utility like CleanMyMac X. It will help you remove large and old files, useless apps, caches, and system junk in two clicks.

Here's how to clean GBs of junk in under 5 minutes:

  1. Download CleanMyMac X and launch it.
  2. Click Scan.
  3. Click Run.

Once you’ve cleaned up your Mac, enable Time Machine backups:

  1. Go to the Apple menu in the top left corner of your screen and choose System Preferences.
  2. Select Time Machine.
  3. Click the Select Backup Disk button.
  4. Choose the disk you’d like to use as a Time Machine backup, then click Use Disk.
  5. Check the Back Up Automatically box in order to back up your Mac to the chosen disk automatically.

That’s it!

Note that your first backup may take a long time, depending on how many files you have. But don’t skip this step — the backup will allow you to restore all your data should somethings goes wrong when you factory reset Mac.

The ultimate checklist before you reset MacBook Pro

Once your files are backed up, next be sure to disable any services that are associated with your system, including iTunes, iCloud, and iMessage, and deactivate programs on your Mac. Just take your time to sign out of everything to avoid those “after the sale” calls from a new user.

1. Deauthorize iTunes

Did you know, you can authorize up to 5 computers, which means that you can play your content just on 5 different Macs? That’s why you need to make sure your computer is not linked to your iTunes account when it gets a new owner. Don’t save this step for later.

Here’s how to sign out of iTunes:

  1. Open iTunes on your Mac.
  2. Click Account in the menu bar.
  3. Choose Authorizations > Deauthorize This Computer.
  4. Provide your Apple ID and password.
  5. Click Deauthorize.

2. Turn off FileVault

FileVault plays an important role on your Mac. It encrypts the data on your hard drive to prevent the unauthorized access to the information on your startup disk. However, since you’re going to restore MacBook to factory settings and wipe all the files, it’s better to turn off FileVault.

Follow the instructions:

  1. Go to the Apple menu > System Preferences.
  2. Choose Security & Privacy, then click FileVault.
  3. Click the lock icon to unlock it.
  4. Enter the administrator name and password.
  5. Choose Turn Off FileVault.

3. Disable iCloud

Sign out of iCloud to make sure that any remnants of the cloud data, such as bookmarks, notes, reminders, etc., are not visible to a new user.

Follow these steps to turn off iCloud:

  1. Choose Apple menu > System Preferences.
  2. Select iCloud.
  3. Click Sign Out.
  4. Confirm that you want to remove data from your Mac.

4. Sign out of iMessage

Before you restore Mac to factory settings, be sure to sign out of iMessage. Here’s how to do that:

  1. Open up Messages.
  2. Click Messages in the Menu bar in the top left corner of your screen.
  3. From the drop-down menu, choose Preferences.
  4. Select your iMessage account.
  5. Click on the Sign Out button.

As simple as that!

5. Erase Touch Bar Data

To ensure that all information is cleared from the Touch Bar, you need to erase its data. Follow these steps:

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  1. Hold down the Command+R keys after pressing the power button to turn on your Mac or right after your Mac begins to restart.
  2. Choose Utilities > Terminal from the macOS Utilities window.
  3. Type this command in Terminal: xartutil --erase-all
  4. Press Return, type yes when asked if you are sure, and press Return again.
  5. Choose Terminal > Quit Terminal.

Step-by-step guide to reset Mac to factory settings

Once you’ve backed up your data and signed out of everything, you are ready to wipe your Mac and give it a fresh start with a new owner. The following steps will tell you how to restore Mac to factory settings.

Step 1: Restart Your Mac in Recovery Mode

This is pretty simple. Go to the Apple menu in the top left corner of your screen and choose Restart. As the system restarts, hold the combination of Command and R keys together — you’ll notice the Recovery Mode window.

Step 2: Erase Mac hard drive

  1. Choose Disk Utility in the Utilities window.
  2. Click on the Continue button.
  3. Choose your startup disk.
  4. Click Erase from the buttons at the top of the Disk Utilities window.
  5. Choose Mac OS Extended (Journaled) from the menu.
  6. Click Erase.

When the process is complete, go the Disk Utility menu in the top left corner of your screen and select Quit Disk Utility.

Step 3: Reinstall your operating system

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Congratulations, you’ve reformatted your hard drive and now you can reinstall a clean Mac operating system. Simply click Reinstall macOS or Reinstall OS X. Confirm that you really want to do it and follow the instructions you’ll see on the screen.

However, if you are not going to keep your Mac, it would be better to quit the process and let the new owner enter all necessary information. Simply hold down the Command and Q keys and then choose Shut Down to turn the Mac off but leave it waiting for a new user.

That’s all. Now your Mac is clean and ready for a fresh start.

We hope this guide was helpful and you got all useful information on how to reset MacBook to factory settings. Stay tuned for updates!

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