Parallels Desktop 9 for Mac lets you seamlessly run Windows and Mac applications side-by-sid

Parallels 9 update doesn't fix OS X 10.9.3 black screen bug

By John Rizzo

Parallels Desktop 9 Build 9.0.24229, released yesterday, does not fix the problem with OS X 10.9.3 virtual machines booting into a black screen. Although Parallels lists "booting into a black screen" as a fixed problem, I found the problem still persists after updating, removing the older Parallels Tools video driver, and reinstalling Parallels Tools.

The problem appears to be a Parallels Tools video driver that is incompatible with Mavericks 10.9.3 when run as a guest OS. After updating Mavericks to 10.9.3 and reinstalling Parallels Tools, the Mavericks guest OS boots to black screen. I previously described removing the driver by booting into Single User mode, which does resolve the problem, though it limits the virtual machine's display to 1024 x 768 pixels.

Unfortunately, installing this new Parallels Desktop update doesn't fix the problem, despite this hopeful item in the update's errata list:

Resolves an issue with virtual machines booting to a black screen after upgrading to Parallels Desktop 9 for Mac.

After updating Parallels to Build 9.0.24229, I opened an OS X 10.9.3 virtual machine (with the previous Parallels Tools installed) -- it booted to a black screen. I then booted into Single User mode and deleted the video driver ( rm -rf /System/Library/Extensions/prl_video.kext). After the virtual machine booted normally, I tried installing Parallels Tools again. Mavericks booted into a black screen once more.

It's a major bug that seems to have been ignored in a maintenance update, which is unusual for Parallels.

By the way, Chris Cohoon is another reader with the problem, but he suggested a workaround that is easier than removing the video driver:

I've seen the issue, its very frustrating. I cannot boot the VM without reverting to my snapshot without Parallels Tools. As soon as I install the Parallels Tools, it will not reboot.

The tip here is "reverting my snapshot without Parallels Tools." I suspect most people don't think to take a snapshot before installing the Parallels Tools drivers. I didn't, usually taking a snapshop after installing Tools, But I do now. Thanks, Chris.

What do you think of this update? .