Menu bar shows that macOS Sierra very frequently uses location services to check the time zone even though Setting Time Zone is disabled
I had the same issue on macOS 10.12.6. Give this a try:


Under System Preferences > Date &amp; Time > Time Zone: Uncheck "Set
time zone automatically using current location"
Disable location services completely
Delete the file "/Library/Caches/com.apple.AutoTimeZone.plist"
Reenable location services again
Restart your computer


Does it solve your issue? Source