Parellel wont start on Mac Pro

We observed that you encountered the error message "The Secure Boot Feature prevented the operating system from starting" when attempting to launch your virtual machine. This typically occurs when a recent Secure Boot certificate update hasn't yet been recognized by the virtual machine's older TPM (Trusted Platform Module) chip, a security component that verifies system integrity during startup.

Important note about BitLocker: If your Windows virtual machine uses BitLocker encryption, please ensure you have your BitLocker recovery key readily available before proceeding. After applying either workaround below, Windows may prompt for this key during startup. To locate your recovery key, please see Find your BitLocker recovery key.

Prerequisite: Before making any changes, we recommend creating a snapshot to preserve your current virtual machine state.

Workaround: Remove and re-add the TPM chip

1. Right-click the Parallels Desktop icon in your Mac dock and select "Control Center."
2. Click the gear/cog icon next to your virtual machine.
3. Select "Hardware."
4. Click "TPM Chip" in the left sidebar.
5. Click the "-" (minus) button at the bottom of the list to remove the TPM chip, then confirm by clicking "Remove."
6. Start the virtual machine.
7. Shut down the virtual machine completely.
8. Return to "Hardware", click the "+" (plus) button, and select "TPM Chip" to re-add it.
9. Close the configuration window and start the virtual machine again.

For more information, visual guidance, and additional troubleshooting options, please see Fixing the error "The Secure Boot feature prevented the operating system from starting" when launching your Windows 11.