what should i do if my left shift key doesn't work?
what should i do if my left shift key doesn't work?
MacBook, macOS 10.13
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Please see if the key is not physically stuck or broken.
Check if you have same issue in safe mode. (use right shift key since you mentioned left shift key is not working)
https://support.apple.com/en-us/HT201262
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
If you have same issue in safe mode try SMC reset: How to reset the SMC of your Mac - Apple Support
Alternative use right shift key. Or An external/other keyboard.
Until you get it serviced / repaired.