It's worth noting you do have to downgrade security permissions for Loopback, but not for BlackHole: https://rogueamoeba.com/support/knowledgebase/?showArticle

It's worth noting you do have to downgrade security permissions for Loopback, but not for BlackHole: https://rogueamoeba.com/support/knowledgebase/?showArticle=ACE-SecurityPolicy&product=Loopback https://rogueamoeba.com/support/knowledgebase/?showArticle=A... I use Loopback and BlackHole both, although for different reasons/setups. I guess it's more an artifact of the surrounding macOS environment at the conception of each project. BlackHole's first commit was September 2019, while Loopback was released in 2016 (but also shares its capture engine with Audio Hijack, and its 1.0 release was 2002!)