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Here are a few things I've found in my personal testing in the past few days. I'm putting them all in the revised installation guide, but here you go for now. Hope this helps!
For some hardware, it may be more difficult to get to the installation screen. You may have to type extra boot arguments in the system at the boot screen you see above. You can hit arrow-down as well on the boot screen to access boot options. Here are a list of things you can try in order to troubleshoot booting to the installer. You will have to troubleshoot this part yourself according to your own hardware specs.
Black Screen, White Screen, Flickering Screen
It's your graphics or possibly your choice of graphics port. The DVI or the HDMI port are usually the most compatible for installation. Reboot and try another port or one of the following flags.
PCIRootUID=0
UniBeast has PCIRootUID=1 set by default for universal support for the majority of our recommended builds. Set it manually to 0 by typing this command at the boot screen above. For example, all UEFI motherboards with NVIDIA cards.
GraphicsEnabler=No
You can install without graphics card injection. This can solve many issues, allowing you to access the installer screen. For example, all NVIDIA 6xx cards.
-v
Verbose Mode- allowing you to see the loading of the OS instead of the Apple Boot Screen with spinning wheel.
-x
Safe Mode- loads only basic drivers. Sometimes a cure-all to reach installer.
Temporary Instructions for AMD 6xxx Graphics Cards:
There is a new issue with AMD 6xxx cards only in the Mountain Lion installation. Instead of messing around with framebuffers, we recommend using an alternate graphics card or onboard Intel HD 3000/4000 graphics for the entire process. After you're fully installed, you can switch back to your 6xxx card.
Intel HD 4000 Graphics
Set Onboard shared RAM in BIOS to 32mb or 64mb. OS X doesn't use this setting, it will use 512mb of RAM for the IGP. If you get a garbled display, you may have to unplug and re-plug the HDMI or DVI connector to get full support. We're still experimenting, but we'll get it right.
Most issues are solved permanently upon completing post-installation using Multibeast. These are only for the first step, reaching the installation screen. Our permanent revised UniBeast for Mountain Lion guide will be available soon, as soon as we're finished testing. For now, we've put out this preview.
Good luck!!
For some hardware, it may be more difficult to get to the installation screen. You may have to type extra boot arguments in the system at the boot screen you see above. You can hit arrow-down as well on the boot screen to access boot options. Here are a list of things you can try in order to troubleshoot booting to the installer. You will have to troubleshoot this part yourself according to your own hardware specs.
Black Screen, White Screen, Flickering Screen
It's your graphics or possibly your choice of graphics port. The DVI or the HDMI port are usually the most compatible for installation. Reboot and try another port or one of the following flags.
PCIRootUID=0
UniBeast has PCIRootUID=1 set by default for universal support for the majority of our recommended builds. Set it manually to 0 by typing this command at the boot screen above. For example, all UEFI motherboards with NVIDIA cards.
GraphicsEnabler=No
You can install without graphics card injection. This can solve many issues, allowing you to access the installer screen. For example, all NVIDIA 6xx cards.
-v
Verbose Mode- allowing you to see the loading of the OS instead of the Apple Boot Screen with spinning wheel.
-x
Safe Mode- loads only basic drivers. Sometimes a cure-all to reach installer.
Temporary Instructions for AMD 6xxx Graphics Cards:
There is a new issue with AMD 6xxx cards only in the Mountain Lion installation. Instead of messing around with framebuffers, we recommend using an alternate graphics card or onboard Intel HD 3000/4000 graphics for the entire process. After you're fully installed, you can switch back to your 6xxx card.
Intel HD 4000 Graphics
Set Onboard shared RAM in BIOS to 32mb or 64mb. OS X doesn't use this setting, it will use 512mb of RAM for the IGP. If you get a garbled display, you may have to unplug and re-plug the HDMI or DVI connector to get full support. We're still experimenting, but we'll get it right.
Most issues are solved permanently upon completing post-installation using Multibeast. These are only for the first step, reaching the installation screen. Our permanent revised UniBeast for Mountain Lion guide will be available soon, as soon as we're finished testing. For now, we've put out this preview.
Good luck!!
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