While macOS has become more locked down (System Integrity Protection blocks modification of system apps like Finder or Trash), you can still customize third-party app icons.
With the advent of ColorSync, icons exploded with life. The "Platinum" theme introduced soft greys and blues. Icons grew to 48x48 pixels and began to look like 3D objects, though still relatively chunky. mac icons
With the introduction of and spatial computing, icons may soon leave the 2D screen entirely. However, for now, the Mac icon remains a staple of digital art. It is a tiny canvas where art direction, user psychology, and programming intersect. While macOS has become more locked down (System