SSD FOR MAC RETINA 5K, 27 INCH, MID 2015 UPDATE
He repeated installing macOS from a USB memory ‘stick’, which also failed to update the firmware.Īs his iMac contains a 256 GB NVMe SSD, he then devoted his attention to that. The firmware remained stuck at 170.0.0.0.0. He then extracted the firmware updater from each of those updates, and just installing those, again going from macOS 10.11.6 up to 11.1. Roman systematically tried re-installing macOS from 10.11.6 right up to Big Sur, without any success. As he has now successfully updated to the current version, he’s keen for me to pass on his experience, in the hope that it might help you deal with your iMac17,1. I’m very grateful to Roman, who has written me a long email explaining all that he has tried to resolve the problem of his iMac17,1 and its out-of-date firmware. From the information I gathered in the survey here, I believe that the firmware update problem extends to iMacs which don’t have an NVMe SSD, rather a hard disk or Fusion Drive, but I haven’t sufficient information to be categorical about this. On replacing those particular SSDs, the Mac is able to update its firmware normally again. Several users have reported recently that their affected iMac17,1 computers have internal NVMe SSDs, most supplied from new by Apple. After a lot of work by many users, we’re still left with the same problem, and no word from Apple as to what’s wrong with all these Macs, or whether Apple can or will fix them, or just hopes that they’ll fade quietly into obsolescence.
I conducted a survey here to try to discover if it was associated with a particular version of logic board, which it isn’t. Several users have been told that ‘engineering is working on it’. It’s now 429.80.1.0.0, and those still stuck in the past are noticing problems with their Macs running such old firmware.Īpple has apparently examined and tested some iMac17,1 computers which stubbornly refused to update. These include the claim that this model didn’t need the updates, which is patent nonsense as Apple has continued to provide them since the release of Catalina, when the firmware version in that model was 170.0.0.0.0. Many users have contacted Apple Support, only to be told one of several different stories. Despite reporting to Apple the large number of iMac17,1 computers which have been troubled by this, I’ve had no response. One model which has proved particularly troublesome is the iMac Retina 5K 27-inch Late 2015 (iMac17,1). In the past, this has been a problem in many Macs which have had their internal storage replaced, particularly with an SSD.
SSD FOR MAC RETINA 5K, 27 INCH, MID 2015 INSTALL
If you’ve not been following the saga of failed firmware updates, you should still be aware that these updates now only ship as part of macOS installs and updates, and that some users have found that they won’t install on their Macs, leaving them with out-of-date firmware despite keeping macOS updated.
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