New answers tagged mac
Test these options, though I am not sure they will work with Parallels in ArcGIS: http://www.wikihow.com/Right-Click-on-a-Mac If none of these work, you can still open the attribute table by a keyboard shortcut (select the Layer and press [CTRL]+[T]): http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//005s00000006000000
You can deselect in exactly the same way as as you select multiple features (without activating a different tool). If you want to deselect one feature from a selected group, ctrl-click on the feature (with the select feature(s) tool active) - or on Mac do command-ctrl-click on the feature you want to deselect. It should leave the others selected. As a ...
one way to do this (usually just on a smallish number of features) is to open the attribute table, and "ctrl+click" (in windows) so perhaps "command+click" (for mac) on the left-hand panel that has the feature no. (i.e. 0,1,2,3,4 etc. for each feature line) - i.e. to the left of your first field column or beneath the top left hand square that selects all ...
Not ideal but what still works is to load style files. I had a layer already styled but no style file saved. I saved the styling to a qml file and then imported to another layer and that worked. qml files are plain text and so easily edited in a text editor. This is a work around and not a fix.
Be warned that QGIS 2.12 does not work on my OSX Yosemite installation. Cannot find why not and did not find others (yet), but just a heads up...
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