To enable the dual screen support on a multi-monitor Hackintosh equipped with an AMD Radeon HD 6870 under OS X Mountain Lion (this works with the current 10.8.4 too), enter the following shell code into your Terminal session:
Just hit command – shift – G in Finder and paste the above path and click Go. You’ll see a list of directories with random hashes, each containing a single file synced from the iCloud. To remove the directories from the view, filter by type Image, and optionally create a Smart Folder.
Apple’s OS X Mountain Lion update to 10.8.3 has yet again modified the IOAHCIFamily.kext, resulting in a failed boot with the “Still waiting for root device” for only a small fraction of users compared to almost everyone with the 10.8.2 version. Most probably Apple techs have increased the enumeration delay, allowing for more devices to register properly. If you are one of these that are unable to boot properly after updating to OS X 10.8.3, check first if you still have /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext (it was missing on one of our machines after updating to the 10.8.3). There is also a known firmware incompatibility for Intel X25-M SSD owners, so if you own one and your system boots from it, you’ll need to update your SSD firmware. Otherwise, apply the patch listed below.
WARNING: Don’t copy-paste everything into the Terminal at once, do it one line at a time. Pasting the whole code at once will result in the second half of the commands being used as your password at the first sudo command.
The following commands place a backup of the unmodified binary before patching it.
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