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The terminal will now be on the screen.įirst input. So first reboot your Macbook Pro into single user mode by holding down the CMD + S keys. But I had two problems - I had no permissions when trying to disable the csrutil and when trying the same with Recovery Mode - CMD + R I had the blue lines on black screen appearing, but the below sorted it for me.

Now there are other solutions that say at first boot into Recovery Single User Mode - CMD + R + S. The solution is to change your energy settings and make sure the screen saver animation options are always active. NOTE: One known issue to this solution (and maybe others) is that when the screen goes to sleep/black it no longer wakes up, therefore needing a forced reboot. Now there are several solutions on the web but this is the only one that worked for me running macOS High Sierra (10.13.6+) and what was worst for me is that the MacBook Pro was stuck in looping reboot. Once downloaded, double-click the installer app in the Applications folder to begin the upgrade.If you are suffering from the infamous blue lines on the black screen on startup or random reboots then you maybe suffering from an AMD graphics card hardware issue with your later 2011 Macbook Pro laptop. ✅ - Using Safari only, download the macOS upgrade installer app: 🖥 – Check compatibility of your Mac with newer versions of macOS. Learn How to Back up your Mac with Time Machine:

❗️ – IMPORTANT – Backup your data, now, before you attempt an upgrade.

The macOS version you can upgrade to depends on the year your Mac was released.Ĭlick the  (Apple) menu at the top left of your screen and choose About This Mac. To be clear, software update generally means to install software to update the macOS currently running on the Mac update Catalina 10.15.1 to Catalina 10.15.7, for example.Ī software upgrade is usually a generational step up to a newer macOS upgrade from 10.13 High Sierra to 10.14 Mojave, for example, or from 10.15 Catalina to macOS 11 Big Sur. Do NOT upgrade until you have made a Time Machine or other backup of your startup drive.