![]() ![]() My focus turned to the MacBook’s internal HDD SATA connector, which is just a flimsy piece of thin metal with some embedded contacts. I let Disk Utility do its stuff checking the disk and OS, but didn’t report any issues apart from some minor permissions errors, nothing big enough to stop the OS booting though. This ruled out my initial suspicion that the SSD had died. After a blow out with some compressed air I tried booting again, with no success.Īfter digging out my external USB 3.0 caddy, I swapped in the SSD and to my surprise the system booted. Resetting the NVRAM and holding down the safe mode/verbose boot keys did nothing to help, so I opened up the Mac to see if dust might be causing problems. ![]() ![]() You gotta love pretty but vague error messages. According to Apple docs this means that your Mac can’t find its system software. The other day my MacBook Pro (13-inch, Mid 2012) presented a flashing question mark during startup and was unable to boot to the OS. ![]()
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