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Reply to Parallels 15 (Mac): Updating macOS Catalina Beta to Big Sur Beta
I was able to get past the "BIErrorDomain error 3" issue in Parallels as follows: On a real, supported Mac, run this command in Terminal: ioreg -l | grep board-id 2. Make a note of the board ID (mine is Mac-551B86E5744E2388, for example) 3. Run this command in Terminal: sysctl hw.model 4. Make a note of the hardware model (mine is MacBookPro14,3) 5. In the VM configuration, under Hardware -> Boot Order -> Advanced Settings -> Boot flags, enter the following (inserting the information noted above where shown): devices.mac_hw_model="<model>" devices.smbios.board_id="<board ID>" That should be enough to allow the installer to proceed.
Jun ’20