Time Machine and other background activities – irregular and unreliable after long periods of running

(Thanks to Richard Petersen for reporting this.) The workaround is to disable display sleep if affected, and rely on a screensaver which darkens much or all of the display. So far the only way to restore a normal image on the internal display is to restart. Although the external displays wake normally, the iMac display does not. Full details are on jamf Nation.ĭisplay sleep – multiple display setups may not wake properly after sleepĪ few users, mainly with iMac 5K models, are reporting that allowing display sleep with one or more external displays connected causes problems when waking. This may relate to a failure to complete the firmware update to the Touch Bar. Suggestions for dealing with this are to restart into Recovery mode, open Disk Utility, and run First Aid on the startup disk, but some Macs have had to be set up from a fresh install of Sierra. This seems less likely when updated using the downloadable installer from here. There are reports that some users with the new MacBook Pro models with a Touch Bar are discovering their Macs are suffering kernel panics, or even getting trapped into an infinite boot loop, after updating to 10.12.4 through the App Store. Touch Bar firmware update – Kernel panics and infinite boot loops on some MacBook Pro models with Touch Bar Note, though, that those are no longer maintained. If you are looking for a list of bugs in previous versions of Sierra, that for 10.12.4 is here, for 10.12.3 is here, for 10.12.2 is here, for 10.12.1 is here and for 10.12 is here. This list is no longer maintained: please refer to that last for the latest information. Note that bad features, poor interface design, and problems with third-party apps, etc., are listed separately here.įollowing the release of Sierra 10.12.6, this list has been superseded by the new list for 10.12.6.

10.12 developer preview download