With OS X 10.11.3 well into beta-testing, I thought it would be helpful to list bugs which I know about in 10.11.2, so that we can see which get fixed in that next update. This is inevitably incomplete: please feel free to add comments about additional ones which you know of.
Finder – incorrect column width
This can occur when using Finder windows which are set to column view. When switching folder in the view, the rightmost column being displayed has excessive width, filling the Finder window, its divider being placed incorrectly at the right edge of that window.
This long-standing but intermittent bug dates back to Mavericks if not earlier, and I have whinged about it here and here. The only workaround is to select a different folder, then to select the correct folder again.
Core Foundation library – loss of drag and drop
After a certain period working in El Capitan, attempts to drag and drop or otherwise cut/copy and paste content fail with a Core Foundation error. In the case of drag and drop, this is likely to be the result of a memory leak, or similar. I have discussed this issue here. Once it occurs, the only way to restore normal function seems to be to log off and log back on again (or restart).
Energy Saver pane – inconsistencies in controls
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. Further details are here.
The only workaround is to use a third-party tool such as MacPilot to edit the preferences instead of the bundled pane.
OS X internals – clicking on a window causes it to jump
When switching between apps by clicking on a window, sometimes the selected app comes to the front and its window jumps to a new position on screen. I used to think that this was confined to certain apps such as Tweetbot, but it also affects Apple’s Messages app and others.
The workaround is to switch to that other app by clicking on its icon in the Dock.
Trackpad – unexpected shift of text insertion point
This is another long-standing bug, which goes back to the early days of Apple’s Magic Trackpad in about 2010. You are typing along happily, with your hands well clear of the trackpad, and suddenly the text insertion point jumps to a different location in the text which you are editing. This is sporadic and completely unpredictable, but affects a wide range of different apps.
There is no workaround.