The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
our user macbooks will not update to current timezone when they return to the office and connect to the company network. they update fine on other networks. the automatic timezone option shows it is unable to connect at this time. this appears to be a firewall issue. has anyone else found a quick resolution or had to open port on their network firewall?
thanks for the clarification. i understand now and know where to troubleshoot. it does appear to be the AP's. i plugged into direct ethernet connection and it worked correctly and then failed to find location as soon as i unplugged and it jumped back over to AP.
They need Location Services to identify the location of the Mac in order to set the Time Zone.
Since they don't have GPS or a Cellular antenna, they use WiFi to triangulate the location. To do that, WiFi must be on (not necessarily connected to a network) and be able to see several WiFi Access Points that Apple knows the location.
WiFi On is not the only requirement.
Being connected to any WiFi network is not a requirement.
Seeing a WiFi access point whose physical Geo-Coords are known to Apple is required.
Either Apple's database does not contain the location of your WiFi access point or any other AP within view or...
your Firewall may be affecting your Mac's ability to access the database of known AP's.
I didn't see anything here: TCP and UDP ports used by Apple software products - Apple Support. 427 is a location protocol port, so I doubt it handles the Location Services AP lookup.
they are on wifi and access points and going out but the location services is being blocked by something. the time zone has message "unable to determine current location at this time". it must be something on our firewall or the MDM.
macbooks unable to update timezone on company network
