Released June 2009 / 2.66, 2.8, or 3.06 GHz Core 2 Duo Processor

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Time stamp on apps is different from my MBP

MacBook Pro 15" (v5.3) Unibody Mid 2009


First, I'm sorry for my bad english and hope you can understand me.

Some months ago, my MBP started to show the wrong time, one hour into the future, although the automatic (apples european timeserver) adjustment is active in system-adjustments.

I have changed it manually, now when i get messages in iMessage or in Safari (facebook) the timestamp is shown the time one hour in the past. --> my time 14:00 but in fb 13:00.

Is this a cmos battery problem?

please help me, i don't know what to do... :(

best regards...

Answered! View the answer I have this problem too

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Chosen Solution

Yes your CMOS battery needs replacing. Heres the iFixIt guide on the steps to get to it MBP "15 Core 2

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thank you for your answer :)

bute i have a, maybe stupid ask, can you show on a photo for my mbp? because it is a little bit different.

i have the A1286 --> Released June 2009 / 2.66, 2.8, or 3.06 GHz Core 2 Duo Processor

MacBook Pro 15" Unibody Mid 2009

i'm not able to find where i can change the cmos-battery.

best regards


Sorry I jumped the gun here. Your system doesn't have a CMOS battery. Check your time zone settings. Make sure it's correct, then manually set the date & time (make sure your not connected to the network in any way). Once you have the Zone, Date & Time correctly set restart your system and then connect to the network it should stay at the correct settings now.


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Most Helpful Answer

Go to System preference > Date & Time > Time Zone and reselect your correct zone.

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Thank you both for the answers. i could not try it, because i'm ill. i will do it some days later...

best regards



thank you for your help. it seems that it helps. the time and the timestamp are now the same. i hope it will stay so...

best regards :)


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Engin will be eternally grateful.
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