I don't recall ever having a problem with files from you. What I run into trouble with is the occasional file from one of my copy editing clients. Happily, my biggest client uses a template that runs on Word X; in fact, they just sent out a questionnaire assessing what software all their freelancers use, so I'm hoping they'll stay compatible with me.
I may want to upgrade next year, but I need to check compatibility. I'm supposed to be getting OS X.4 today; that's the highest-end OS my machine will ever be able to run, as it's a Power PC system. I may want to look at a Mac Mini next year; I'd rather replace the core unit and keep the Samsung monitor than spend the money for a complete new computer. That would let me go to OS X.6 and more current software. On the other hand, replacing all my software may be a higher ticket item than buying the computer!
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I may want to upgrade next year, but I need to check compatibility. I'm supposed to be getting OS X.4 today; that's the highest-end OS my machine will ever be able to run, as it's a Power PC system. I may want to look at a Mac Mini next year; I'd rather replace the core unit and keep the Samsung monitor than spend the money for a complete new computer. That would let me go to OS X.6 and more current software. On the other hand, replacing all my software may be a higher ticket item than buying the computer!