A possible fix for your Mac's lost audio alerts
I've experienced this issue many times. A new email arrives, or some other such event that ought to trigger an audible alert from my Mac, but I get nothing but silence.
Until Apple decides to fix this long-standing problem, the Mac Observer has one possible solution. They suggest unplugging any external speakers that use the headphone jack, and then plug them back in. In some cases, it works. But not reliably. My Mac has failed to produce an alert noise after waking from sleep, and even without any external speakers connected.
Of course, it could be settings. In Mail>Preferences>General, check the box for "Play sounds for other Mail actions." Then in System Preferences>Sound>Special Effects, turn the Volume for "Alerts" all the way up.
There also appear to be problems with a stuck internal microswitch. You can see if that's a problem by looking for a red LED in the headphone port. Try plugging and unplugging your speakers or headphones about half a dozen times to fix it.
Apple support boards have been filled with people talking about these problems for years. There are a variety of fixes, but they don't seem to stick. Apple, can you hear us? Perhaps Cupertino's alert sounds are muted, too.
Software Updatesmore updates
- Apple Remote Desktop updated with Yosemite support
- OS X Yosemite 10.10.2, iOS 8.1.3 updates now available
- Sports Illustrated 120 SPORTS channel comes to Apple TV
- Logic Pro X update brings AirDrop support, new effects, tools, and more
- Parallels Access 2.5 released, adds file manager, computer-to-computer remote access
- The Google Translate iOS app is about to get a lot smarter