Hi, MacBinary file should not check by very-long-line-length-in-source-file. For exmaple: https://sources.debian.org/src/libicns/0.8.1-3.1/samples/test3.bin/ file test3.bin test3.bin: MacBinary, busy, char. code 0x80, Sun Feb 9 19:14:58 2003, modified Sun Feb 9 19:14:58 2003, creator 'Mngl', type 'Icon' "Gnu_III", at 0x80 41026 bytes resource Apple HFS/HFS+ resource fork, map offset 0xa006, map length 0x3c, data length 0x9f06, nextResourceMap 0xe9084, fileRef 0x75, list offset 0x1c, name offset 0x32, 1 type, 0x69636e73 'icns' * 1 resource offset 0xa Thanks!