If you have a modern Mac (2020+) and a new camera, skip 5.4.6 and get the latest driver. If you are on a "Hackintosh," an old Mac Pro, or a legacy MacBook Air running Mojave/Catalina, version 5.4.6 is your gold standard.
Always verify the SHA256 checksum of the downloaded .dmg or .zip file. The official checksum for Lens-5.4.6.dmg is available in the GitHub release notes. lens 5.4.6 download mac