Slaught3r replied to binaryhat's question in OS X Mavericks 10.9Hey all, I found a simple fix that worked for me. Your mileage may vary. With your VM off, change the default video RAM back to the default of 9MB. I had mine set for 128MB and it didn't like it at all. Once back at 9MB the sucker booted right up. Hope this helps someone.