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one by one, checking for driver updates. how to update macos high sierra 10.13.6 to 10.15
Your Mac will now begin writing the installation files and will eventually restart. The screen may go black or show an Apple logo with a progress bar multiple times. This is completely normal and can take anywhere from 30 minutes to over an hour. Troubleshooting Common Upgrade Issues "The disk uses the Mac OS Extended format" If you can tell me what or how
Go to – you’ll likely see “macOS Catalina 10.15.7 Supplemental Update” and Safari updates. Install all of them. This may require another restart. Your Mac will now begin writing the installation
If you notice odd behavior (Wi-Fi dropping, sound glitching):