I want to replace my HDD but the following comment in the "discussions.apple.com" forum suggests to me that a 7200 rpm drive won't work.???----That may be so but neither the 21.5” iMac nor the mini offers a 7200 RPM drive option so its a moot point. Given that these drives are dead slow and that the likely reason Apple uses them is their low thermal load, Fusion or SSD are the only viable solution. Even if Apple offered SSDs larger than 512GB in these machines, the price for 1TB and larger SSDs is quite high so the Fusion becomes a viable solution.
I want to replace my HDD but the following comment in the "discussions.apple.com" forum suggests to me that a 7200 rpm drive won't work.???----That may be so but neither the 21.5” iMac nor the mini offers a 7200 RPM drive option so its a moot point. Given that these drives are dead slow and that the likely reason Apple uses them is their low thermal load, Fusion or SSD are the only viable solution. Even if Apple offered SSDs larger than 512GB in these machines, the price for 1TB and larger SSDs is quite high so the Fusion becomes a viable solution.