I tried the usual reboot, resetting PRAM, etc., but the symptom would either not change or shift to a different issue, e.g., the speakers would com back but no all iDevices would show up. ![]() Selecting an alternate audio connection like the built-in headphone jack would unfreeze the video.Ģ) Some of my USB connected iDevices would not show up in iTunes. As part of this issue all audio-video content such as YouTube, CNN, iTunes, etc., would lock up when attempting to play. Here's what I've discovered and a workaround that worked for me:ġ) My AudioEngine 2+ USB connected speakers stopped working. ![]() Yeah, USB issues abound in the latest beta build. The update also includes new PDFKit APIs, cricket results in Siri, and more options in iCloud Analytics. The feature "warms" display colors at night, in theory making it easier to go to sleep. The macOS 10.12.4 update is intended to make a variety of minor improvements, most notably bringing Night Shift from iOS to the Mac for the first time. If so, Apple will likely have to prepare a follow-up update, with arrival dependent on how severe Apple considers the situation. Some forum posters have speculated that there could be trouble with the audio drivers in 10.12.4. ![]() Testing continues across a variety of headsets and macOS hardware. It may be that only specific headset brands are affected, something supported by the fact that many of the complaints involve Plantronics gear. People reporting the problem have noted that the issue isn't solved by a clean reinstall of macOS 10.12.4, and only seems to vanish after restoring to 10.12.3 or an earlier OS.ĪppleInsider has been unable to replicate the issue in limited testing. The glitch doesn't appear to be linked to a single Mac model or headset brand, and many troubleshooting methods - like resetting hardware or changing USB ports - don't seem to work.
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