MacbookPro Mid-2010 15' First off I'm not crazy- I've just literally never done this and I like to know every detail. So my stock HDD is failing and I bought a 500GB SSD to replace it with. Long story short I cannot clone the failing drive, I cannot boot into internet recovery mode either to install the OS onto my SSD. I've spent probably 4 hours trying different ways to get Mac OS Sierra, El Capitan, Snow Leopard and Lion installed onto my SSD via the App Store.

1. How To Install New Hdd

I can begin downloads but they won't finish and the one time it did finish it said the file was corrupted and wouldn't let me install it. Facts: -I've already formatted my SSD as a boot disk. -I've already backed up my important files I want to keep to a USB. -I've tried numerous troubleshooting forums and suggestions but because of the failing hard drive I'm unable to clone my files, unable to download the applicable OS from the App Store, nothing.

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How To Install New Hdd

The only option I have is to get the current hard drive out of there. Question: Can I just go ahead and swap out my HDD to my new SSD, and go buy the disk of Mac OS Snow Leopard or Lion and pop it in to install it?

Your problem may be in your format. It has to be GUID mac OS X extended. You do not want to clone as you will not get the repair partition. It sounds like you do have an external adapter or enclosure.

Next please tell us the exact SSD you are trying to use. Not all are backward compatible to SATAII Serial ATA (3 Gb/s). Apples last installable DVD they sold was the 10.6.3. They never sold anything higher in a disk. Your machine will take an initial install from this disk but I don't think you will need to do that once we get your other issues corrected.

BTW, the hard drive replacement seemed to have cut my battery life by about 3 hours. This is a major downgrade to me, personally, even at the slight performance increase, so purchase this hard. Buy 500GB New Sata 2.5' hard drive for Apple Macbook & Macbook pro: Internal Hard Drives. I experienced the gray screen of death first hand when my 2010 13 inch. Connect your new hard drive to your Mac: A new hard drive is ideal here. If you use an older hard drive, things get more complicated. If you use an older hard drive, things get more complicated.

Literally any 2.5' SATA drive would work-- HDD, SSD, or SSHD of any brand. Unless you actually need that 1TB of space at that cheap of a price, definitely get an SSD instead.