Have Mavericks and P9 with Win 8.1 and Win 7 Pro VM's. Just updated to P9 9.0.23140 a couple of days ago when it came out. And believe me, I obsessively keep checking for new updates for P9 and even Mavericks with all the different bugs going around. Anyway, so now, after the 9.0.23140 update, I can no longer run my Win Pro 8.1 and Win Pro 7 VM's at the same time. When I do, the entire Mac seizes up and does not recover unless I do a dirty shutdown. Woe is me! Son of a beaches! Lol I know, posting this stuff here does not make the Parallels developers take action. Just a place where we can vent and hopefully find workarounds and help each other. And how am I suppose to get an error ID when the whole system freezes? Or can I? Oh well, one VM at a time then and just obsessively keep punching the Check for Updates menu. hehe
perhaps a reinstall? multiple VMs running and no freezes here. how much memory (os x) and what are you allocating to each VM? 8gb total, 1gb to win 7, 1 gb to xp, 2 gb to win 8 and 2 gb to win 2008 r2. i try to run no more than 3 at a time max. 2 is common. 7 & xp are 32-bit, 8 and 2008 r2 are 64-bit.
Hi Tony -- thx for the reply. I have an MBP 13 late 2011 i7 with 16GB total. My 2 VM's (Pro 8.1 and Pro 7) have 2 CPU's and 6GB ea. Too much? I just turned them down to 3GB ea. Let's see what happens now when I run them both simultaneously. Maybe I should take them both down to only 1 CPU ea and 2GB ea? Thx again!
I have that issue when I assign too many cores to the VM, not necessarily memory. Try dropping the cores on one of the VM's and see what happens. Are you running VMWare side by side any chance? Or virtualization inside the VM (say Win8 mobile simulator)?