iMac 27" 2011 middle + hdd seagate 3 tb sata 3 + ssd intel 520 240 gb sata 3

Mi Problema

too slow internal hdd 1 tb sata 2

Mi Solución

using iFixit guides - "Hard Disk" + "Dual Hard Drive"

Mi Consejo

be careful with LCD! and after hdd replacement (not ssd) hdd fan will very loud - in mac os x use for example smcfancontrol or hdd fan control.