![]() In the past, the only way I was able to get around the problem, is by re-formatting my HD, installing latest version of Mojave OS, and then migrating all my data from my Time Machine backup. doing the NVRAM reset (problem persists).attempting to start in safe mode (problem persists).specifying the startup disk (problem still persists).I’m still able to boot into recovery mode ( command- R at startup), however running disk repair on my MacBook HD does NOT solve the problem. Rebooting still produces a prohibitory symbol. I have a MacBook pro running MacOS Mojave.įor the past year or so, every time a new MacOS update rolls out, and is attempted to be installed on my MacBook, it ends up displaying the circle slash (Prohibitory Symbol). ![]() SOLVED: MacBook Will Not Start Up After macOS Update Here are some details -bash-3.2# diskutil listĢ: Apple_CoreStorage Macintosh HD 749.3 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ġ: Apple_HFS Macintosh HD +748.9 GB disk1ĬoreStorage logical volume groups (1 found) sameĬreated a recovery thumbdrive with a working copy of high sierra on another mac, booted from that, tried to do reinstall OS, did its thing, rebooted. Recovery again, use terminal i can see the files, they are there, i can browse in terminal.ĭid FSCK from terminal completes all is fine. Recovery booted, loaded recovery fine, did Disk Utility, it says the drive is fine. rebooted, came up but was running slow.Ī couple days later, a high sierra update showed up, so thinking it would fix my slowness i installed it. I "stupidly" clicked on update for High Sierra and it upgraded to high sierra. This 'puter was just fine, nothing wrong, runs great, use it for software dev. I tried recovery boot, disk utility, repair etc. Ive been researching and fighting this for a couple days now.
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