As a single disk: PoP1.hfs (5MB)
Also available as two 1.2MB disks:
1/2: pop1_12.hfs; 2/2: pop1_22.hfs
"Mac" here means the classic Macintosh (e.g. Mac OS 7); not Mac OS X.
You will need an emulator. See this manual.
These are disk images with uncompressed files, so you don't need a (BinHex or StuffIt) expander.
In case you need it, here is a cheat sheet for the copy protection.
Instructions for GNU/Linux users: 2016-09-23_PoP_for_Mac_on_Linux.pdf