The apple icon format is fairly simple and contains PNGs that can be optimised. https://en.wikipedia.org/wiki/Apple_Icon_Image_format Note that, like .ico, not all the entries are necessarily in PNG format.
The apple icon format is fairly simple and contains PNGs that can be optimised.
https://en.wikipedia.org/wiki/Apple_Icon_Image_format
Note that, like .ico, not all the entries are necessarily in PNG format.