Paul Kafasis has looked into the abyss of Tahoe icons:
On the new MacOS 26 (Tahoe), Apple has mandated that all application icons fit into their prescribed squircle. No longer can icons have distinct shapes, nor even any fun frame-breaking accessories. Should an icon be so foolish as to try to have a bit of personality, it will find itself stuffed into a dingy gray icon jail.
While Apple had previously urged developers to use squircle icons on our apps, they’ve now taken things much further to ensure compliance. It’s a shame.
Apple updated their own app icons on Tahoe, for both the squircle shape as well as the new “Liquid Glass” interface. Mostly, these icons seem dumbed-down, with a loss of detail.
Almost all of these new icons are a step backwards, but I think the updated icons for DVD Player and Image Capture are an improvement:
