No boot with OS X 10.8.2 and VT-x/VT-d enabled

[tkrotoff]

OS X 10.8.2 cannot boot with VT-x/VT-d enabled.

Suggestions:

• /System/Library/Extensions/AppleACPIPlatform.kext has to be replaced with the 10.8.1-version
• Remove OEMSMBIOS.kext
• Remove OemSMBIOS.kext
• Remove OEMsmbios.kext
• Install Kozleks branch of FakeSMC
• Install Kozleks branch of FakeSMC

[amitpdev]

Any stable/tested solution out of those 6 suggestions ?

[tkrotoff]

• My FakeSMC.kext does not include OemSMBIOS.kext as I didn't install "FakeSMC Plugins" from MultiBeast
• MultiBeast 5.2.1 says FakeSMC is already from kozlek
• Using latest FakeSMC from kozlek does not solve the problem, I get the error vtd[0] fault: device 3:0:0 reason 0x5 at boot time

Related topics:

• vtd[0] fault after 10.8.2 - google hasn't heard of it, any help?
• use kernel flag dart=0 to boot. You can disable intel virtualisation too
• Maybe try running the machine with dart=0 kernel option, since you have the i7 CPU that's VT-d capable.
• one can simply configure the kernel boot argument: dart=0 to avoid the DMAR processing

They speak about dart=0 option. This option (Remove mapper present) and the matching code can be found in IOKit IOPlatformExpert.cpp

I have no idea what it is all about but it works fine on my computer (Core i7 3770).

Two solutions remain:

• Revert AppleACPIPlatform.kext to version 10.8.1
• Use kernel flag dart=0 <--- solution that I personally prefer

Edit file /Extra/org.chameleon.Boot.plist and add dart=0 to the kernel flags, it should look similar to this:

    <key>Kernel Flags</key>
    <string>darkwake=0 dart=0</string>

[amitpdev]

Thanks!
I really need the VT-d capabilities fully enabled as i'm running virtual boxes for testing some linux dists.
If I understand correctly, "dart=0" will not break VT-d feature ?

btw,small typo.. should be "Revert AppleACPIPlatform.kext to version 10.8.1"

[tkrotoff]

"dart=0" will not break VT-d feature ?

On my hackintosh, VirtualBox works with dart=0and VT-x/VT-d enabled inside the BIOS :)

[tkrotoff]

See commit 87fffcf

[amitpdev]

dart=0 tested successfully with 'VT-d' and 'Intel Virtualization' features enabled on BIOS.

[i-am-the-slime]

Yeah! I was worried that I would not be able to use VT-x/VT-d!

[bestimmaa]

VERY helpful, thanks for sharing!