Letter i was highlighting entire line on my Mac

Just solved a very weird problem on my Mac.

When I typed the letter “i” the entire line would get highlighted. Basically my Mac had become useless. I envisaged days or weeks of lost productivity whilst I sent my Mac back to get a replacement.

It turned out to be a setting I’d enabled in Accessibility > Mouse & Trackpad > Enable Mouse Keys.

Why had I done that? To solve another bug on my Mac where the cursor disappears on external monitors. There seem to be several of these ongoing bugs that have never been fixed.





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