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I have recently bought an SSD (Crucial MX500) and an USB enclosure (EE25-F6B). I wanted to use it instead of my internal drive in iMac(Late 2012). I tried installing macOS Mojave on it from a usb stick, but the instalation always failed when it was trying to convert the drive to APFS. So I tried El Capitan but the installation crashed everytime when it showed 2 minutes remaining. So I connected it to MacBook (2016) to see if it was faulty. It successfully installed and I was able to boot from it. But when I connected it back to the iMac, it didnt show up in the boot menu. But when I boot from my internal drive I can see it in the finder. I also tried booting from it on MBA and it worked. I have tried reseting SMC and NVRAM but it didnt help.

  • are you saying, the iMac does not recognize the external SSD with Mojave on it ? – Ruskes Dec 6 '18 at 22:03
  • @Buscar웃 Yes, it doesnt. But when I connect it to Macbook (2016) or Macbook Air it works perfectly. – Thomas Dec 6 '18 at 22:29

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