Version 6.0 was the first to run natively on , with the 6.1 update refining this transition for improved stability.
If you manage to locate original installation discs or legitimate backup files for these versions, you will face severe technical hurdles on modern computers: QuarkXPress 4.1 5.0 6.1 Passport download
Version 6.0 launched in 2003 as the first Mac OS X-native QuarkXPress (though 5.0 could run in Classic mode). But 6.0 had performance issues. was the real hero: Version 6