This article describes how to configure a Mac Studio for Video I/O Compatibility using Mac OS 15 and newer. Click here to view this page in a web browser.
If you want to view these steps for Mac OS 14 and older, click this link.
Configuring Video I/O Compatibility (OS 15 and Newer)
1) On the Mac with Apple silicon, choose Apple menu > Shut Down
2) Press and hold the power button until “Loading startup options” appears
3) Click Options, then click Continue
4) Select a startup disk, then click Next
5) Select an administrator account, then click Next
6) Enter the password for the administrator account, then click Continue
7) In the Recovery app, choose Utilities > Startup Security Utility
8) Select the system you want to use to set the security policy
9) If the disk is encrypted with FileVault, click Unlock, enter the password, then click Unlock
10) Click Security Policy
11) Select Reduced Security: Allows any version of signed operating system software ever trusted by Apple to run
12) Then enable the following option:
- Allow user management of kernel extensions from identified developers: Allows installation of software that uses legacy kernel extensions
13) Click OK
14) If you changed the security, click the User pop-up menu, choose an administrator account, enter the password for the account, then click OK
15) You must restart your Mac for the changes to take effect. Choose Apple menu > Restart
Note: If you’re having difficulty starting up your Mac with Apple silicon, and you believe the problem might be related to installing third-party software, you can try starting up your Mac in safe mode.
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