OS X Yosemite

Sir Apfelot Blog

13. September 2019
Error message when installing OS X El Capitan.

Fix errors "can't be verified" and "error occurred while preparing the installation" on OS X.

My reader Peter wrote to me a few days ago that he received a strange error message when installing OS X El Capitan and then only could press "OK", which aborts the installation. The exact [...]
18. October 2014
OS X Yosemite screenshot

Mac OS 10.10 - my first impressions and known problems

Actually, after the iOS 8 debacle, which caused me some problems with my iTunes library, I always had to wait 1-2 weeks before installing major updates, what problems [...]