Similar to the question here, is there a way to change the login background wallpaper in Big Sur? During the beta, I was able to do it via a combination of the procedures in Catalina and the bless command described at https://eclecticlight.co/2020/06/25/big-surs-signed-system-volume-added-security-protection/

This doesn't seem to work with 11.0.1 (20B29). It keeps reverting to the com.apple.os.update-779B* snapshot. Note that I am using FileVault.



1 Answer 1


FileVault has to be OFF, to use a non-system sealed shapshot to boot Big Sur

  • Don't know if this is true, but I've read if you break the seal you'll no longer be able to use FileVault. Nov 26, 2020 at 6:06

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