Wow! 3 years ago I tried the Mac version of OpenLP and couldn't even get it to open - 'not responding'. Same today as it was then. It doesn't matter what Mac, what OSX, but the program will be grief, hastle and a nightmare, even to do the most basic things..... like simply opening the program. Such a shame, that it's so, so, so so, bad. Oh well, I'll try again in another 2 or three years.......