User`s guide

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Use Windows on Your Mac
Optimize Performance
If Windows isn't working as speedily as you'd like, there are several simple ways you can optimize
its performance. This section contains many helpful instructions for doing just that.
Read this section to find out how you can tune Windows for speed.
Set How Much Memory is Allocated to Windows
Parallels Desktop is set to allocate a certain amount of your Mac's available RAM memory to
Windows and the rest to Mac OS X. If too much memory is allocated to Windows, Mac OS X may
slow down, which in turn can cause Windows programs to slow down because they're running on
top of Mac OS X. If, on the other hand, too much memory is allocated to Mac OS X, then Mac OS
X applications may run well but Windows programs might slow down.
To optimize the performance of both Windows and Mac OS X, set the memory allocated to
Windows to be somewhere within the recommended range.
To set how much memory is allocated to Windows:
1 Shut down Windows (p. 47).
2 Choose Virtual Machine > Configure, and then click General.