Finally got macOS 10.13 to install, but it's not easy. Clone the existing 10.12 install to a external USB HDD (using Carbon Copy Cloner). Boot from the USB drive. Install 10.13 onto the USB drive (very slow, but it works). Boot into 10.13 from the USB drive to check it is working. Erase the internal SSD and set it to be an APFS volume. Clone the 10.13 install from the USB drive back onto the internal SSD. Boot from the internal drive and ensure it's all working. Total time to install - approx 6 hours due to all the cloning to an external USB 2.0 drive. Doing this meant the High Sierra installer doesn't do the firmware check on the internal SSD drive and fail. But I can format the SSD as APFS from within 10.13 and then clone back to it which seems to be working perfectly. Not exactly happy that I have to do this on what was sold as a '100% compatible' drive, but at least I have it working.
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I have a late 2011 MacBook Pro (13 inch), which I upgraded with a Crucial BX100 SSD (identified in macOS as CT500BX100SSD1). When trying to upgrade to the latest version of macOS 10.13 (High Sierra), the upgrades fails complaining about a firmware validation error. Upon looking in the log file for the install, it becomes clear that the upgrade fails at the point when the SSD drive is being checked for compatibility with the new APFS file system. As soon as the check fails, the OS aborts the install. Does anyone know anyway I can get High Sierra to install or whether there is a firmware update to the SSD that will allow it to work? My MacBook is a supported model and it's failing due to the Crucial SSD drive. Without High Sierra I won't be able to get the latest security updates and it will prematurely force retirement of a perfectly working laptop.
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