OS: Mac 10.5.8
Parallels version: Parallels desktop 7 for MAC
Mac hibernate mode: 5
Symptom: mac freeze when waking from hibernate mode with VM running

Possible solution:
Change hibernate mode to 1

1.Check the current setup
pmset -g | grep hibernatemode

2. Change the sleep mode setting
sudo pmset -a hibernatemode 1

—-hibernate mode info——
0 – Old style sleep mode, with RAM powered on while sleeping, safe sleep disabled, and super-fast wake.
1 – Hibernation mode, with RAM contents written to disk, system totally shut down while “sleeping,” and slower wake up, due to reading the contents of RAM off the hard drive.
3 – The default mode on machines introduced since about fall 2005. RAM is powered on while sleeping, but RAM contents are also written to disk before sleeping. In the event of total power loss, the system enters hibernation mode automatically.
5 – This is the same as mode 1, but it’s for those using secure virtual memory (in System Preferences -> Security).
7 – This is the same as mode 3, but it’s for those using secure virtual memory.