Apple have confirmed that Logic (understandably) will run fine.
Whilst not exclusive to just the Catalina update, the demise of iTunes may cause some problems for DJs as existing songs may not sync with current DJ’ing software due to the iTunes replacement not being XML compatible.
Should I Upgrade To Catalina?
If you’re using your Mac solely for music production and recordings, we would suggest holding off on upgrading for now, at least until any creases are ‘ironed out’.
If you do want to upgrade, perhaps you are using your Mac for work or other none-production features then it’s worth checking that your plug-ins aren’t 32 bit first.
In order to find out, head to the Apple menu and click ‘About This Mac’, followed by ‘System Report’ and then scroll to ‘Applications’ which will show you which applications are 64 bit and therefore will run in Catalina.
If you do decide to go ahead, there will be a prompt before installation that bring up your 32 bit applications that you’ve recently used, giving you the chance to cancel the installation if necessary.