So I have a 2013 MBP that I'm trying to install to give to my friend. I've bee running a 500GB Samsung Evo 850 for a few years. I'm trying to put in a 250GB one in.

I've managed to install macOS High Sierra when in a usb cage I've got. It boots just fine off of my original SSD. So I don't think it's the cable or the ssd.

I've been installing off of a USB installer I made using my new macbook. I've reset the SMC and PRAM.


No idea what's going on. I've given up and left the 500GB drive in the computer while I keep the 250GB with my stuff on it on the side.

  • Does disk utility see it?
    – A.G.
    Nov 11, 2017 at 23:11
  • No. Not even showing all devices. Nov 11, 2017 at 23:12

1 Answer 1


Is the new SSD properly formatted? I’ve had issues before where the drive was still FAT or whatever, but the Mac partition was properly formatted and looked ok.

  • So it doesn't show even when I click show all drives. My old ssd does and is fine. So when I boot off of the USB, go into Disk Utility, I can't even format it there. I had to format it from another computer. It also boots off of it. I got to the OS setup screen when attached via USB, so it's installed the os. Was also formatted to MacOS Journaled with a GUID partition. Nov 11, 2017 at 23:05

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