In old versions of OS X, you could simply drag any icon you wanted into the toolbar to add it . You can still do that, but as Macworld points out, you’ll need to hold down the Command key in modern versions of OS X for it work.
In old versions of OS X, you could simply drag any icon you wanted into the toolbar to add it . You can still do that, but as Macworld points out, you’ll need to hold down the Command key in modern versions of OS X for it work.