What is the performance impact on Mac OS X, 10.6 specifically, with VMware Fusion or Parallels Desktop 5 for Mac when the virtual machine is not running? Stated another way, does installing Fusion or Parallels impact boot time of Mac OS X?
I've used Parallels Desktop for Mac—versions 3, 4, and 5—to access a Windows XP virtual machine once or twice a week. Given the limited amount of time that I use the virtual machine, I'm not wanting Parallels, or VMware, to impact Mac OS X's performance when the virtual machine is not running.
My suspicion with Parallels is that it does impact performance even when the virtual machine has not been activated, but I have not done enough testing to isolate the cause to confirm. I have confirmed that on startup of the Mac, there are entries in the logs related to Parallels—network adapter stuff for instance.
I reinstalled a fresh copy of Mac OS X. So far I'm happy with the boot times and performance; however, at some point I'm going to need Windows again and will have to break down and install either Parallels or VMware Fusion.
- Comments by JoshK and emgee in response to Jonik's answer indicate that VMware Fusion is more stable and has had less random freezes of the Windows virtual machine.
- SuperUser question [VMware vs VirtualBox...what I should use]
- SuperUser question Does VMware Fusion negatively affect system performance?