Upgrade from Mavericks to Yosemite

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hi,

purchased mbp in 2008 , till never missed os upgrade not had issues. notice following upgrade yosemite, system boot time has increased drastically extent had revert mavericks in under 2 days. in addition, system response slow well.

can please advise can workaround slowness experienced? machine not optimized running yosemite? or bluetooth card comes causing issue?

i've max'ed out mbp (during purchase direct apple) @ 4 gig ram , 256 gig hdd. other problem have fans running @ full speed (this problem surfaced following having motherboard , few other items replaced on 55th day of purchase).

please advise.
 

reset both smc , pram after installing yosemite. should address delays in boot or shut down. had same issue on late 2013 rmbp , fixed issue.
 


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