
174 Parallels Desktop for Mac User Guide
Main Memory.
The Main Memory parameter defines the amount of virtual memory (RAM) to be used by the
virtual machine. You can choose any value from 4 to 2048 MB. We advise you not to exceed
the recommended maximum because this is the limit of the physical RAM that your system can
reserve for virtual machines without affecting the performance of Mac OS X. If the specified
amount is not enough for normal performance of your virtual machine, the memory will be
swapped to disk, thus slowing down both the guest OS and Mac OS X.
To set the amount of memory that this virtual machine can use, do one of the following:
Drag the slider.
Use the scroll buttons.
Type the value directly into the field (Only multiples of 4 are allowed).
The recommended maximum value is specified below the slider. This value can be adjusted on
the Memory tab (page 219) in the Preferences window.
Video Memory
Use the slider to set the amount of video memory that the virtual machine's video card can use.
While you move the slider, below the slider you can see the maximum screen resolution
available with this video memory.
The recommended maximum value is specified below the slider.
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