I'm running Yosemite on a 27" iMac with 3 TB Fusion drive and 32 gb RAM. Should fly - and it does, on boot from cold. 15 seconds up and running. But when launching some programmes (MS Word, Pixelmator, Camtasia and many others) I get the dreaded beachball for what feels like an age before everything will run. Funnily enough, Pages (which I hardly ever use) launches pretty much instantly. Anybody out there got an answer for how to manually prioritise Apps?