Macbook not keeping time

[iabm]

Hi all,

My older MBP that I use more than my new one doesn't seem to keep time. If I close the lid then come back to it, it sticks at the time I closed the lid. For example I closed the lid at 15:57, just opened it and it stayed at that time when it is in fact 17:29.

The only way for me to get the right time is either turn off the wifi then turn it back on again or go into settings, time and turn it from auto and back on.

The first time it did this was when I had been away and it had died for a while - the only way to get it to the right time was in terminal and putting in some prompts I'd seen on the apple website.

The laptop is a 13-inch, 2020. 1.4 GHz Quad-Core Intel Core i5. Intel Iris Plus Graphics 645 1536 MB. Intel Iris Plus Graphics 645 1536 MB.

Just wondered if anyone has any ideas as to the root cause? Any help would be great. Thank you!

Thanks,
B.

 

[Hajj.david]

Might be the CMOS battery/capacitor but they usually last like 10-20 years+ what happens if you don't use AUTO time and just manually set it?

 

[iabm]

Might be the CMOS battery/capacitor but they usually last like 10-20 years+ what happens if you don't use AUTO time and just manually set it?

I thought the same. Surprised if it needed changing. I've not turned it off from Auto to be fair.

 

[seamuskrat]

Sounds like NVRAM or CMOS issue. Id try resetting both as a first troubleshooting step. Try this.

1. 1. Shut down your Mac.
   2. Press the power button, and as soon as you power up the laptop, hold down Command-Option-P-R.
   3. Keep holding down those keys for about 20 seconds. Then let go and allow your Mac to continue starting normally. If you have an older Mac that chimes at boot, hold down the keys until you hear a second startup chime.
   4. Then check the Startup Disk, Display, and Date & Time panes of System Preferences to make sure they’re set the way you want them.