If you're looking to download or update PluralEyes 4 on Mac, the most important thing to know is that PluralEyes has been officially discontinued by Maxon (formerly Red Giant).

PluralEyes 4 for Mac has long been the industry standard for filmmakers and editors who need to sync multi-camera audio and video instantly. While it was originally developed by Red Giant (now part of Maxon), the landscape for this software has shifted significantly in recent years. The Current Status of PluralEyes 4 As of 2023, Maxon placed PluralEyes into maintenance mode

If you are searching for a free "updated" way to sync audio because you don't want to pay Maxon, you may not need PluralEyes at all. Both and DaVinci Resolve have built-in "Sync by Audio" features that are now incredibly robust.