Aerial: You cannot use the Aerial screen saver with this version of macOs

[mzdhr]

You cannot use the Aerial screen saver with this version of macOs
mine is:
macOS Sierra
version 10.12.4
iMac 21.5 late 2013

[danny-peters]

Im on that same version, my only difference is that I am on a 15" MacBook Pro late 2012 (Retina).

[alistairmcmillan]

@mzdhr @flamerock

1) Select Aerial in System Preferences.
2) Close System Preferences.
3) Re-open System Preferences.

The error should now be gone.

If you still see the error please let me know.

[alistairmcmillan]

If you are curious why this is happening, it's a bug in macOS caused by multiple different versions of the Swift libraries. You can read more about it here.
http://alistairmcmillan.github.io/2016/04/25/OSX-Swift-screensaver-bug.html

It was reported to Apple over a year ago. They still haven't fixed it.