Forbidden icon when upgrading a MacBook Pro 2011
Upgrading a MacBook Pro 2011 with a SSD is the easiest way to boost your old laptop performance. Follow the tutorial here.
You dont need a thumbdrive to reinstall MacOS on the new SSD
One particular situation is that when I tried to install the MacOS on the new SSD, after selecting the thumb drive it prompted me a forbidden logo (a circle with a line through it) and the system halted.
From the Youtube comments I found that the root cause for this forbidden logo is the thumb drive. Remove it and proceed with wifi restoration by pressing option key then it will be fine.
From Lion to High Sierra
Please beware that you need to upgrade from Lion to El Capitan to High Sierra, but not directly from Lion to High Sierra.
For 2011 MacBook Pro, the last version of macOS supported is High Sierra.
You won’t be able to search El Capitan on Lion App Store, but you can access it through the link below:
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