Resetting SMC. Left shift key not working, is right shift key an option?

Left shift key broken. Can't reset SMC. Is there another option to reset it? Reason, USB ports disables because over drawn current. Nothing in USB ports. MBP 2013 Catalina 10.15.7

Posted on Jan 29, 2021 4:05 AM

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Jan 29, 2021 4:38 AM in response to OldNewUser

OldNewUser wrote:

Left shift key broken. Can't reset SMC. Is there another option to reset it? Reason, USB ports disables because over drawn current. Nothing in USB ports. MBP 2013 Catalina 10.15.7


You can read it all here: SMC https://support.apple.com/en-us/HT201295


Only the newer Macs have some very specfic requirement on the key board left vs right and the T2 chip.


Your 2013 MBP is not on that list. However the HT specifically says Left Shift key for your machine.

Jan 29, 2021 4:53 AM in response to OldNewUser

OldNewUser wrote:

Left shift key broken. Can't reset SMC. Is there another option to reset it? Reason, USB ports disables because over drawn current. Nothing in USB ports. MBP 2013 Catalina 10.15.7


I will add —Typically port definition is reset with each reboot, or reset NVRAM. This does not always sort the issue.

Therefore SMC is easy enough —Both can be reset using the Terminal



you can reset the SMC and NVRAM in the new Single User mode— this is done through Recovery now.

Recovery: https://support.apple.com/en-us/HT204904


simple way to reset both the SMC and NVRAM using Terminal—


start up in Single-User Recovery mode using Command S R then enter the command line:

pmset -a restoredefaults && nvram -c


Reboot as normal.


Mac startup key combinations: https://support.apple.com/en-au/HT201255

Jan 31, 2021 3:01 AM in response to OldNewUser

OldNewUser wrote:

Forgot to say I am logged in as Admin. To-day the fan is noisy and the mag connection shows no led light'.
Unplug power and laptop shut down, for first time


Any thoughts


Hmmm...With no access to USB ports, a wired external keyboard seems out of the question for a work a round. I do not believe a wireless key board is adequate to respond to reset SMC or resolve your issue...


I would pursue the issue w/ Customer Support  (800) MYAPPLE (800–692–7753) to explore your options and/or repair

or on line  https://getsupport.apple.com/



Learn how to get your Mac desktop or Mac notebook fixed and how much it will cost.

https://support.apple.com/mac/repair/service


Get your Mac ready for service - Apple Support   https://support.apple.com/en-us/HT209095

Mar 6, 2021 9:07 AM in response to OldNewUser

OldNewUser wrote:

I did what you suggested but your solution with pmset command has made bad situation worse. What else can
i do with pmset? I want to get back to when the battery was working and get the fan quiet again.



If no resolve you can try:

sudo nvram -c



This post started in January and you still have an issue— I recommend you contact Apple for a hardware issue:


Call Customer Support  (800) MYAPPLE (800–692–7753)


or on line  https://getsupport.apple.com/

or call  AppleCare Support at 1-800-APLCARE (800-275-2273)



Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

https://support.apple.com/en-us/HT201232




 “Mac notebook, contact us and we'll send you a box you can use to ship it to an Apple Repair Center. We'll return your repaired product to you as quickly as possible. Depending on where you get service, you might be able to check the status of your repair online.”  Start a service request https://support.apple.com/mac/repair/service





Learn how to get your Mac fixed and how much it will cost.   

 https://support.apple.com/mac/repair/service


Get your Mac ready for service - Apple Support   https://support.apple.com/en-us/HT209095



Jan 31, 2021 1:18 AM in response to leroydouglas

Thank you for your solution . I have waited 4 years to re-enable the ports.




On entering your command in Terminal I received this message.


“You’r not privilaged” also via email “Error path


 /System/Library/PrivateFrameworks/SystemAdministration.framework/Versions/A/Resources/activateSettings,”



see below:


joseph@daniels-mbp ~ % pmset -a restoredefaults && nvram -c


You're not privileged.


joseph@daniels-mbp ~ % 

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Resetting SMC. Left shift key not working, is right shift key an option?

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