Loading screen with two green dots along white line on my iMac
My iMac is constantly trying to load with apple sign and ‘loading’ line showing , then screen goes black half way…nothing else
iMac (2017 – 2020)
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Like this? If your Mac starts up to an Apple logo or progress bar - Apple Support
Note the very last line: "If you need help, contact Apple Support."
You can of course come backer with a progress report and ask for further guidance.