Hi, i made a copy + paste error with the repacking command. Option -apm-block-size lacks its parameter "2048".
Correct would be: mount debian-8.6.0-i386-DVD-1.iso /mnt/iso xorriso -as mkisofs \ -o test.iso \ -V 'Debian 8.6.0 i386 1' \ --modification-date='2016091713290100' \ -isohybrid-mbr --interval:local_fs:0s-15s:zero_mbrpt,zero_gpt,zero_apm:'debian-8.6.0-i386-DVD-1.iso' \ -partition_cyl_align off \ -partition_offset 0 \ -apm-block-size 2048 \ -c '/isolinux/boot.cat' \ -b '/isolinux/isolinux.bin' \ -no-emul-boot -boot-load-size 4 -boot-info-table \ -eltorito-alt-boot \ -e '/boot/grub/efi.img' \ -no-emul-boot -isohybrid-gpt-basdat -isohybrid-apm-hfsplus \ /mnt/iso If this ISO does not mount on Mac, it would be interesting to see whether omitting option -isohybrid-apm-hfsplus yields a better result. Have a nice day :) Thomas