An old editor for Mac, released in 1993.
Download: PoPMap_10b5.hfs (1.2MB)
Version 1.0b5 was released by Alan T. Goates on 27 May 1993.
The above file is a disk image with uncompressed files, so you don't need a (BinHex or StuffIt) expander.
You will also need Prince of Persia 1 for Mac.