For some time now I've been experiencing an issue where once my mac is rebooted, it can take up to 15 minutes before it's usable again.
I only have one app that opens when the computer starts up, and that's Spotity (which normally I force quit).
I've checked activity monitor, and I can't see anything that's using too much CPU and there's plenty of RAM free (9Gb free). Also no swap space being used.
Machine in question is...
2011 iMac OS X Yosemite 10.10
Core i5 2.5Ghz Processor
16Gb 1333 MHz DDR3 RAM
Can someone help attempt to track down what the issue may be? if there is one?