I have had a few Intel Mac users in academia ask me this week if Acrobat 8.0 for Mac OS X is a Universal Binary application. The answer is “YES!”
That is, it will run natively on Macs with Intel chips and those that have PowerPC processors. Rosetta is a translator that allows Mac software applications that were built for PowerPC processors to run on Mac OS X for Intel-based machines, albeit with a performance hit. For example, Acrobat 6.0 or 7.0 will run on Rosetta as they shipped before Apple started making available Intel-based Macs.