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Create disc image in Mac OS
# Mac OS 10.12.16
Step
1. Open Disk Util
2. New Image > Blank Image
3. Settings:
Image Format: DVD/CD Master
Partition map: (No Partition map), if set, it will fail
Format: ExFat / MacOS both working
Size: Size needed
The output file is in cdr format. It is writable in Mac, not sure if it is mountable with
# To convert .cdr image into windows compatible format .iso
# use hdiutil inside Mac OS terminal
hdiutil makehybrid -iso -joliet -o [filename].iso [filename].cdr
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