Booting iMac in Recovery partition takes forever I'm trying to boot the recovery partition on my Mid 2010 iMac 27 to do a Time Machine recovery. 

OSX is installed correctly already and I can boot that quickly. However, when I try to boot the recovery partition I get the grey screen with apple logo and a progress bar. This one is so slow I have the feeling there is no progress at all, while my machine sounds like it is doing a lot of stuff. What can this be? Is this normal? 

Or is there also another way to recover my mac without recovery partition?
Ok, so in the mean time I have:


Updated OSX from 10.10 to 10.11
Tried regular recovery again, and now it worked. Guessing the update fixed the recovery disk somehow.


Now in process of restoring the mac.