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The virtual machine starts each time you start Fusion.
Setting Virtual Processors and Memory
You can configure processor settings for a virtual machine, including the number of processors, the
amount of virtual memory available, and whether to enable hypervisor applications, code profiling
applications, and IOMMU.
Set the Number of Virtual Processors
You can increase performance of a virtual machine by making more processors available because more
tasks can be performed simultaneously. When you assign a virtual processor to the virtual machine, it
reduces the processor resources that are available to your Mac.
For Windows virtual machines running mostly office and Internet productivity applications, using multiple
virtual processors is not beneficial, so the default single virtual processor is ideal. For server workloads
and compute-intensive applications, adding extra virtual processors may provide an increase in
application performance.
Application Recommended number of processors
Desktop applications 1 processor
Server operating systems 2 processors
Video encoding, modeling, and scientific 4 processors
In some circumstances, adding additional processors can decrease the overall performance of the virtual
machine and your Mac. This can occur if the operating system or application is not using the processors
efficiently. In this case, reducing the number of processors is recommended.
Assigning all processors on the Mac to the virtual machine results in extremely poor performance. macOS
must continue to perform background tasks even if no Mac applications are running. If you assign all
processors to a virtual machine, this prevents important Mac tasks from being completed.
Prerequisites
Shut down or power off the virtual machine. You cannot change the setting while the virtual machine is
powered on or suspended.
Procedure
1 Select Window > Virtual Machine Library.
2 Select a virtual machine in the Virtual Machine Library window and click Settings.
3 Under System Settings in the Settings window, click Processors & Memory.
4 Select the number of processor cores for the virtual machine.
Information about your selected number of processors is displayed at the bottom of the Processors
& Memory window.
Using VMware Fusion
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