Hi Bryce Fans

As you know Mac users are having a lot of trouble with OSX Lion and Mountain Lion when it comes to using Bryce as quite simply it won't work and OSX Lion and Mountain Lion are rubbish as these operating systems are slow and sporadic. I have spoken to someone who tells me it is possible to Downgrade to Snowleopard this works only however on if your mac had Snowleopard in the first place. Simply Restart the Computer(Make sure you back up Everything.) then when it restarts hold down the alt key with the snow leopard disk that came with your mac in the mac and reinstall snow leopard you would need to back up everything but it should work and then if you feel you still need mountain Lion or Lion make a new partition on your hard drive and install it on the partition. I woulld suggest you check out videos on how to do so if you are unsure(I am never upgrading as I believe the Upgrade is an obselete version of snowleopard even though they are upgrades.)

I hope this helps you Check out Youtube for downgrading to snowleopard if you are unsure.

Cheers

Karl