I just switched to OSX for all of my audio apps. My mac freezes, at random times, bringing down a dark curtain and it gives me an alert in different languages to restart my computer. This only happens when an audio app is running. Even with itunes. Someone told me it had to do with my RAM. That if I had all the same kind of RAM installed the problem should go away. Thoughts?

Pierpaolo, That's a very good possibility. The problem definately sounds hardware related, and there are many people who 'think' that if they pop in just any old RAM chip into a G4 - it'll be cool - yet it's not as simple as that. You know when you first start up your Mac - there's this long delay (even in OS 9)? That's the CPU checking the RAM - and the latest Apple Macs are very picky about what kind of RAM is inside them - or more to the point - they "prefer" one sort over another. So yeah - if you have a couple of el-cheapo PC100 DIMMs in there, it would be worthwhile testing it by taking out the RAM you upgraded with leaving only the original base amount of RAM that Apple put into it at time of purchase and see if it happens again. I tried it with my G4 867 MHz - as I'd come across two extra 512 MB DIMMs and they were PC133, yet not supplied by an Apple dealer - and the result was that the G4 just would not start up period - grey screen. Took them out - everything back to normal again. Thus - the G4's "are" really picky. Then again - it might have something to do with what kind of equipment you've got attached to your G4. If it was me - I would firstly disconnect all peripheral devices and run a two day test. If it began to black curtain me - I'd remove the third party RAM and test again. If that made no difference - I'd swap keyboard and mouse for another keyboard and mouse - (this one sounds like a rather odd thing to do yet i can assure you that there is a reason behind swapping the I/Os) - and finally - if nothing made a scrap of difference - I would take it into an Apple Service Centre and have the trained techs attempt to nut it out. See how you go via logical elimination - and drop us a line to tell us how you went Pierpaolo. cheers clockwork