![]() This can occur when using Finder windows which are set to column view. These are long-standing issues which date back to El Capitan. The only way to prevent hard disks from being put to sleep is to prevent system sleep altogether. Further details are here.Ī further bug affect some models, including the iMac17,1: irrespective of the setting to put hard disks to sleep (ticked or not), system sleep invariably puts hard disks to sleep. The features available in the Energy Saver pane of System Preferences are inconsistent between Macs, and incomplete, for example not providing a separate control slider for system sleep on some hardware. Workaround: use a wired (USB) keyboard, or connect an Apple Magic Keyboard using its charging cable.Įnergy Saver pane – inconsistencies in controls, and misbehaviour on some models Trying to do the same in Sierra 10.12.1 or later may fail, and normal startup proceeds. Prior to macOS Sierra, it was usually possible to enter Recovery mode, holding the Command and R keys during startup, using a wireless keyboard. Recovery mode – may require a wired USB keyboard to enter Workaround: widen the time window specified by -start and -end, or use -last instead.Īdditionally, the log collect -size option still does not restrict the size of log entries output – it is functionless and there is no workaround. There also appear to be deeper issues in the new log system itself, which are discussed here and timestamp drift is discussed here. Widening the time window will normally result in discovering more entries in any given period. Using log show, the -start and -end options now work better than in 10.12, but still do not discover all log entries in the specified time period, or may use an incorrect time period. Log (command) – bugs in show and collect options logarchive file, then browse that using Console. Alternatively, you can export the whole log to a. Workaround: use the log show command in Terminal, or LogLogger5d from here. This has been the case since Sierra 10.12. The Console utility does not provide full access to log entries already gathered before the app is opened. No workaround has been discovered.Ĭonsole – no access to full historic log data These appear to be bugs, and have been present since 10.12. Many users report that this remains stuck at Calculating…, and that one or more of the sections in the left of the Manage… dialog also remain busy and never report a size, even after months. If you open About This Mac and select the Storage tab, the top bar should, after a while, display the disk usage on your startup volume. Workaround: restart the Mac every week or so, or possibly to allow it to sleep. I have reported this to Apple on its Radar system. Although this appears most commonly when a Mac has been running for over ten days, it can occur after just two days.įull details and log excerpts are here. This is also likely to affect all other scheduled activities, and could for example make servers unreliable when they have been running for periods of around 14 days or more. This is almost certainly the result of a bug in Grand Central Dispatch’s Duet Activity Scheduling (DAS), which suddenly stops performing regular evaluations of its list of scheduled activities. Macs which are left running, without system sleep, for longer than about a week may start to make Time Machine backups at very irregular intervals. Time Machine and activities scheduled by Grand Central Dispatch – backups and other activities run at irregular intervals 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.
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