Mac storage basics · Caches, logs and temporary files
How do I clear Premiere Pro's media cache?
Short answer: Open Premiere Pro's Settings → Media Cache to delete unused cache files, move the cache to another drive, or have old cache files removed automatically.
In Premiere Pro, open Settings → Media Cache. There you can Delete unused cache files, move the cache location to another drive, and turn on automatic deletion of older cache files.
Cache files are rebuilt when needed, so a project may conform and render again the first time you open it afterwards. Other Adobe video apps share the same media cache settings.