Any way to tell apart macOS versions by the login screen or lock screen?
Until 10.10, there was a textured background for the login screen. 10.10-10.11 was flat grey I believe, then 10.12 on showed a blurred background image.
Until 10.10, there was a textured background for the login screen. 10.10-10.11 was flat grey I believe, then 10.12 on showed a blurred background image.