Stop 10.10 hang at 50% boot

I’ve tried all of the above suggestions which did not provide a consistent fix. But this does.

On the client only, you may hijack the unused /etc/rc.server bash hook, eg single user boot:

bash-3.2# mount -uw /
bash-3.2# /usr/bin/nano /etc/rc.server

#!/bin/sh
/bin/echo BootCacheKludge
/usr/sbin/BootCacheControl jettison

Boots are now completing %100 of the time.

Edit: We are now beta testing this workaround on ~50 machines.

Enjoy!