I guess it wouldn't work on both to begin with if it was, would it? Thanks for visiting. Please lock thx
Forgive the greenhorn but I'm about to swap an Officejet Pro L7580 off of Leopard and put it on Vista 64. I know, look at the guy who actually uses Vista. Hilarious. That said, if I upgrade the firmware for the printer via the file I downloaded from the Vista 64 files on HP website, will that render it inoperable again on Leopard when I reconnect with the Mac?

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