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webknjaz/macos-13-under-parallels-18.md

Created March 7, 2023 15:53
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Observations and gotchas of running macOS 13 guests under Parallels Business 18
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macos-13-under-parallels-18.md
  1. When using Parallels' port forwarding feature with the virtio network adapter under the Parallels hypervisor, the transfer rate is so slow that it takes almost 5 minutes for a 1MB file to go through. Connecting to the VM port directly, not through the forwarded port, does not exhibit the bug. Switching to a different adapter or changing the virtualization to Apple fixes it.
  2. Under macOS 13, using any network adapter other than virtio, makes networking completely non-functional. So switching the hypervisor is the only workaround available.
  3. When the number of allocated CPUs is shrinked down to 1, the Settings window may become unresponsive or parts of the settings are unavailable/grayed out. I couldn't see what apps have full disk access, for example. Increasing the CPU number to 2 makes it work. 1-CPU VMs are enough for the CI, though.
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