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Preface: I was already running a stable Lion build on the same hardware, so this guide only walks through how I upgraded to Mountain Lion. The STEP's referred to in this guide are from tonymacx86 - UniBeast 1.5: Install OS X Mountain Lion on Any Supported Intel-based PC.
Follow STEP 1: Purchase OS X Mountain Lion and STEP 2: Prepare a UniBeast USB.
Prior to STEP 3:
- Unplug power cord, remove graphics card & plug monitor cable into the on-board video port.
- Unplug Ethernet cable and all other peripherals except for a USB keyboard and mouse. Plug in power cord.
- Power on, press F12 to choose boot device. Select USB HDD.
- At boot screen choose USB, type GraphicsEnabler=No (just start typing, command line will pop up) and press Enter.
Now continue following STEP 3, starting at #4 through #16. When the installation completes, however, shutdown instead of restarting.
- Plug in Ethernet cable.
- Power on, press F12 to choose boot device. Select USB HDD.
- At boot screen choose Mountain Lion, type GraphicsEnabler=No and press Enter.
My previous Lion setup used a second 1TB internal hard drive for Time Machine Backups, so I used Setup Assistant to restore all of my backed up user profiles, media & data to my new installation. If you do not wish to restore any data at this point, skip this step.
Continue following STEP 4, #1 through #7.
Run MultiBeast 4.6.1, select the following options:
- UserDSDT Install
- System Utilities > Repair Permissions
- Drivers & Bootloaders > Kexts & Enablers > Audio > Realtek ALC8xx > Unified Device Injector > ALC8xxHDA
- Drivers & Bootloaders > Kexts & Enablers > Audio > Realtek ALC8xx > AppleHDA Rollback
After MultiBeast finishes, shut down, re-insert graphics card (and any other peripherals) then power back on.
If the Internet is not working, re-run MultiBeast and select:
- System Utilities > Repair Permissions
- Drivers & Bootloaders > Kexts & Enablers > Network > Lnx2Mac's RealtekRTL81xx Ethernet v0.0.90
Complete the Lnx2Mac installation, restart. As a general rule I always run MultiBeast > System Utilities > Repair Permissions after installing any additional software, including Updates from Apple.
Edit: Forgot to mention, everything seems to be working just fine (sound, Internet, apps). If that changes I'll post another update. Enjoy!
Follow STEP 1: Purchase OS X Mountain Lion and STEP 2: Prepare a UniBeast USB.
Prior to STEP 3:
- Unplug power cord, remove graphics card & plug monitor cable into the on-board video port.
- Unplug Ethernet cable and all other peripherals except for a USB keyboard and mouse. Plug in power cord.
- Power on, press F12 to choose boot device. Select USB HDD.
- At boot screen choose USB, type GraphicsEnabler=No (just start typing, command line will pop up) and press Enter.
Now continue following STEP 3, starting at #4 through #16. When the installation completes, however, shutdown instead of restarting.
- Plug in Ethernet cable.
- Power on, press F12 to choose boot device. Select USB HDD.
- At boot screen choose Mountain Lion, type GraphicsEnabler=No and press Enter.
My previous Lion setup used a second 1TB internal hard drive for Time Machine Backups, so I used Setup Assistant to restore all of my backed up user profiles, media & data to my new installation. If you do not wish to restore any data at this point, skip this step.
Continue following STEP 4, #1 through #7.
Run MultiBeast 4.6.1, select the following options:
- UserDSDT Install
- System Utilities > Repair Permissions
- Drivers & Bootloaders > Kexts & Enablers > Audio > Realtek ALC8xx > Unified Device Injector > ALC8xxHDA
- Drivers & Bootloaders > Kexts & Enablers > Audio > Realtek ALC8xx > AppleHDA Rollback
After MultiBeast finishes, shut down, re-insert graphics card (and any other peripherals) then power back on.
If the Internet is not working, re-run MultiBeast and select:
- System Utilities > Repair Permissions
- Drivers & Bootloaders > Kexts & Enablers > Network > Lnx2Mac's RealtekRTL81xx Ethernet v0.0.90
Complete the Lnx2Mac installation, restart. As a general rule I always run MultiBeast > System Utilities > Repair Permissions after installing any additional software, including Updates from Apple.
Edit: Forgot to mention, everything seems to be working just fine (sound, Internet, apps). If that changes I'll post another update. Enjoy!