Automatic time different on iPhone and Macbook!

Why not start a new thread here? I am so annoyed at my macbook always displaying the time three minutes late. Though this issue has been on this forum since 7years ago the banana's at apple seem to ignore it and do not offer any explaination. My iPhone appears to be correct but both my macbooks are late! Respectively 3 and 6minutes. Is there any other solution than disabling the 'set time automatically' and syncing it manually? Disturbing that Apple is so inconsistent im displaying the time on two devices that are both connected to the same router using the same internet of things....