hdiutil-dmg-convert.sh

hdiutil convert disk.dmg -format UDBZ -encryption AES-256 -o output.dmg

Now you can delete the original encrypted DMG. Finally, use ASR on the computer to add checksums:

asr -imagescan XXX-XXXXX-XXX.dmg

An alternative way to build a read only DMG (UDZO) is to type:

dmg build XXX-XXXXX-XXX-decrypted.dmg XXX-XXXXX-XXX.dmg


hdiutil attach XXX-XXXXX-XXX.dmg -debug



   Reverse size ramdisk.dmg 
  
  hdiutil convert -format UDRW Ramdisk.dmg -o Converted.dmg
  
  Mount the ramdisk:
  
 hdiutil attach Ramdisk.dmg
  
  remove file uselless "nice checksums file"
  
  cp file patched 
  
  fix hash bin *ldid 
  
  Unmount the ramdisk: 
  
  hdiutil detach /Volumes/ramdisk
  
  xpwntool ramdisk.dmg pwned_Ramdisk.dmg -t orig_xxx-xxxx-xxx.dmg -iv .. -k ..
  
  enjoy