I was on PD9 last night, noticed the major slowness and chalked it up to PD9 on Yosemite. I upgraded to PD10 today (thinking this was my $50 solution) and it's still the same behavior on Yosemite.
I exhausted every avenue I could find including the following:
1. Enabling and disabling TRIM (thinking it was an HDD/SSD issue).
2. Installing new Windows VMs on PD9 and PD10. Same useable/slow behavior.
3. Uninstalled PD10 and installed a clean copy. Tried installing another new Windows (7 and 8.1) VM.
4. I copied my VM onto another HDD to see if this was related to my SSD, that made no difference.
My CPU usage (using iStat Pro and Activity Monitor) sky rockets even when the Windows VM is sitting on the login page. So with the VM supposedly sitting idle, the CPU is 150% on Activity Monitor and 40-50% on iStat pro. Seems very peculiar.
Also noticed a really odd display issue. When trying to install a new VM, or load an existing one, when I move my mouse, there is activity (like the loading circle in Windows) or when I am installing Windows on a new VM, the copying of files etc. There is no activity on the screen for several seconds if I don't move my mouse OR if you move your mouse, then all of a sudden it shows activity.
I highly suggest that anyone looking to upgrade to Yosemite and relies heavily on their Windows VM's, do not upgrade to Yosemite! Regardless of what PD version you are on.
Last edited: Oct 19, 2014