Found on Telegram Channel:
“You can’t mount it directly. BeOS bootable iso is in fact a multi track image. You could use bchunk to split it into two images:
– ISO 9660 El Torito bootable image
– BFS image (contains the operating system)
Unfortunately the .cue file has a wrong info on the beginning of the second track. The only way to do it is using dd:
dd if=DevEd22.iso bs=1M skip=5175296 iflag=skip_bytes of=deved224.img