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Apple's line of laptops for professional and power users. To date, the MacBook Pro line includes 13, 14, 15, 16, and 17-inch variants, with major revisions defined by Pre-unibody(Original), unibody, Retina display, Touch Bar, and SOC (system-on-a-chip) designs.

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How to fix bottons not working

my volume and shift left button including left alt button just stopped working how can i fix this. could it be a software problem since i never upgraded to the latest mac software ?

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Highly unlikely - (though you should run the most updated version of the OS when possible - an exception might be that an update breaks the functionality of a critical use application or hardware.

It would be more likely that physical damage to the top case / keyboard has caused this issue.

A possible test would be using a USB or Bluetooth keyboard. . . if that works fine it would eliminate software but confirm a hardware issue.

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laurence will be eternally grateful.
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