After installing/upgrading to macOS® upon starting Parallels Desktop, you may receive the following notification:
Legacy System Extension
Existing software on your system loaded a system extension signed by "Parallels International GmbH" which will be incompatible with a future version of macOS. Contact the developer for support.
Parallels Desktop uses System Extensions to provide you with the best performance, functionality and seamless experience.
In the newer versions macOS® you may see this notification informing your that these System Extensions will be incompatible with future versions of macOS®.
Parallels works closely with Apple® to ensure that Parallels Desktop continues to function in all future releases of macOS®.
Starting with macOS® Big Sur, you can eliminate the need to use Parallels system extension altogether by switching to Apple hypervisor:
1. Make sure that the virtual machine is shut down. If it is in a suspended state, please run it and then shut down (Actions > Shut Down).
2. Open the virtual machine's Configuration (click Parallels icon || > Control Center > right click on the virtual machine > Configure).
3. Go to Hardware > CPU & Memory > Advanced Settings > and change Hypervisor to Apple.
Note: Parallels hypervisor enables some advanced features, such as nested virtualization. Therefore, switching to Apple hypervisor may not be advisable in cases when these features are essential.
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