For OSX 10.10 on hacks

Few notes from release  notes.

In Developer Preview 1 unsigned or improperly signed kexts will not be loaded. To use unsigned kexts during development, this strict check can be disabled by adding a “kext-dev-mode=1” boot arg.

Installing kernel extensions on systems running Developer Preview 1 may make your system un-bootable. To fix the issue, boot into the Recovery Partition and run the following:

touch /Volumes/OSX10.10/System/Library/Extensions
kextcache -u /Volumes/


  1. Scellow
    June 2nd, 2014 | 11:38 pm


    I tried your boot arg using clover but same result, i can’t reach install screen, stuck on grey/white screen with mouse

    Maybe my hack is badly made ?

  2. misha
    June 3rd, 2014 | 4:36 am

    I cannot find mach_kernel in the Yosemite install app. Tried to create install USB without it but the installation would stop complaining that can’t find mash_kernel. At the same time I noticed that Yosemite on a genuine iMac does not have mash_kernel in the root directory while Mavericks has it!?

  3. yami
    June 3rd, 2014 | 7:22 am

    says read only

  4. Yolanda
    June 4th, 2014 | 11:54 pm

    Misha, use Clover, it doesn’t require kernel file, and will let you to install and use Yosemite. The only problem is that FakeSMC kext can’t be loaded within installation, and it’s required to load it manually from console.

  5. duffs
    June 5th, 2014 | 2:28 am

    installed no problem .. exotic patch works to. 🙂 i like it.

  6. June 10th, 2014 | 2:19 pm


    some how that got lost ??

    its for 3rd party kexts


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