In versions 1.6 and 1.6.1, right clicking by using the mac shortcut control + click wasn't working at all, thankfully that's fixed. However, now when I use that shortcut to right click, sometimes it starts continuously right-clicking rapidly. This is very annoying when I try to build, as with each block I place I have to be careful, or else it will start spamming blocks everywhere and I have to remove those. If I spawn mobs, I have to be careful or else it'll spawn 10 or so mobs in a row which I have to clean up.
The glitch only seems to happen if I release the control key for too long. When I place a block, my hand on-screen does a placing animation- if I release control before the placing animation is finished, the rapid-fire placing starts. If I wait until the animation is finished to release control, everything is fine. Obviously, though, it'd be a pain to monitor how long I hold down control every time I place a single block. When the rapid-fire placing starts, it seems to go on continuously until I click escape, open chat, open my inventory, etc.
I don't recall having this problem before 1.6 and the new launcher, whatever changes were made recently seem to have caused it. It's making building rather frusterating, and that's the right click method I've always used and am used to, so if you could fix it it'd be much appreciated.