Q:

Alert sound on the hour, every hour (OSX and iOS)

Both my Mac and iPhone (possibly my iPad, not sure) play an alert sound on the top of every hour (I believe -- certainly a few of the hours). I don't use notifications for anything (that I am aware of). How do I stop the sound?
The weirdest thing is that I can't find evidence of anyone else having problems with this.

A:

You've checked the Announce time option in Clock tab in System Preferences -> Date & Time.
Uncheck it to silent your Mac. Regarding iPhone, there is no such option until and unless you've set the notifications for an app to behave like that.
Please check the image below for reference

