Why does my Macbook Air clock reset?

Question

Level 1

5 points

Why does my Macbook Air clock reset?

My early-2015 Macbook Air (operating on OS X Yosemite 10.10.5) is currently only on its 198th battery cycle count, yet every time I disconnect it from the charger it will completely shut down the computer (even when at 99/100%); and often after restarting it, the time and date will have changed to 1pm on 1st Jan 2009. If I try and access the internet it will bring up a web page saying "clock error" and I have to manually reset the date and time. Why is this? What can I do to fix it?

MacBook Air, OS X Yosemite (10.10.5)

Posted on Oct 21, 2016 4:47 PM

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Answer 1

kaz-k

Level 9

52,016 points

Oct 21, 2016 10:51 PM in response to alessandra_t

Run Diagnostic to check your MacBook Air.

And make Genius Bar appointment to show them your MacBook Air.

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Answer 2

OGELTHORPE

Level 9

57,349 points

Oct 22, 2016 3:55 AM in response to alessandra_t

You have a faulty battery connection or a faulty battery. When you disconnect the charger the battery should take over to power the MBA. If it does not, the date/time will be reset to the default date. Bring the MBA into an Apple store genius bar for a FREE evaluation.

It is possible that a SMC reset may be beneficial (I have doubts but it will not hurt to try):

https://support.apple.com/en-us/HT201295

Ciao.

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