"The selected Max application could not be loaded. A 64-bit version is probably required."

• Live Versions: All
• Operating System: Mac

In order to fix this error follow these steps:

1. Close Live.
2. Delete Max.app from Applications (if not using the bundled version of Max, otherwise proceed to step 3).
3. Reset Max for Live.
4. Eject the Ableton Live installer .dmg if it's mounted in Finder.
   
5. Install the latest version of Max for Live
6. Launch Live.
7. Go to Preferences → File/Folder.
8. Point Live to the folder where Max is installed (/Applications/Max.app).
9. Try opening a Max for Live device.