My clock on my mac is not working

[jumpbeat]

Hello, I have a question if someone has a solution to the problem. My clock on my mac is not working properly my clock is always when I reconnect after half an hour, she goes 2 minutes before and if the pc is 9 to 10 hours on, it is about 30 minutes ago. What can I do about it?

 

[BreBo]

@jumpbeat, please update your profile (personal details) with your Motherboard, CPU and Graphics Card.
If you have a prebuilt computer enter make and model instead of motherboard (Mobo).

Profiles need to contain at least your primary system to assist others with helping you.

Perhaps the CMOS Battery needs to be replaced.