Unless you can give a reason, you probably don't *need* another hard drive. It's risky to upgrade the 21.5" iMac and will likely void your warranty. Best way to upgrade disk capacity is with an external USB3 or Thunderbolt connected drive.
Fixing electronics I'm ok ish with and the hard drive is shot if I bought a external hd will the mac run faster ?? As I'm getting this message
Then by all means go for it. I believe Apple uses laptop grade hard drives for all iMacs. Any of those will do. Also, Might wanna consider an SSD?
Then by all means go for it. I believe Apple uses laptop grade hard drives for all iMacs. Any of those will do. Also, Might wanna consider an SSD?
I'm down with 26139 on this.
You pay a professional shop for their knowledgeable labor, expertise, and their warranty on the work. In your case, unless you are hundreds of miles from the nearest AASP--and even then, this is a slam-dunk no-brainer.
They (the AASP (Apple Authorized Service Provider)) will know if replacing your primary with a SSD (Solid State Drive) is possible/advisable.