I fear that this is one of the worse OSX updates. I've seen a lot of issues in the GM. For example my USB audio device (an amplifier) is no longer working. The

I fear that this is one of the worse OSX updates. I've seen a lot of issues in the GM. For example my USB audio device (an amplifier) is no longer working. The Wifi connectivity issues are not fixed. The Airdrop connection between my MacBook and the iPad Air does not work. A Lisp system did not start because Apple removed some font protocol. Stuff like Screen split between two apps are non-intuitive. There is lots of good stuff, but Apple created also new problems or failed to fix really annoying old problems (like Wifi connectivity issues, the buggy and unreliable Finder, the annoying slowness of iTunes with larger music libraries, ...).