blank screen after switching to full screen view

I am new to Minecraft. I dont know what version I have, but the launcher is 1.4.4 On my mac, I switched to full screen view, now the screen goes black immediately after launch with background music. No way to get back to regular view, no nothing. Is there a shortcut to switch back to regular view from the black screen? I have tried deleting and reloading the program and it is still the same. I found others have posted this same issue, and it is supposedly "resolved" but I cant seem to find any way to resolve it. Please help.