Selecting multiple items (e.g. two bars in a bar chart) is a hassle on Mac. In Chrome it doesn't work at all to Ctrl+click (it only brings up a context menu) and in Safari there is a work-around to click twice (see link below).
But even if there exist work-arounds this behavior is really poor and half of our organization suffers from this issue. Make sure to fix a proper multi-selection functionality on Mac!