====== Handling physical and virtual media in macOS ======
===== Disk image manipulation =====
== Mounting ==
''hdiutil attach Adobe\ Photoshop\ 7\ DE.img''
== Attach as block device, but don't mount ==
''hdiutil attach -nomount -noverify Downloads/QuickTime_Installer_6.5.1.dmg''
== Create an image from a folder ==
''hdiutil create -volname $VOLUMENAME -srcfolder $SOURCEFOLDER {-format [[macosspecificcommands#image formats used by hdiutil|$IMAGEFORMAT]]} -fs [[macosspecificcommands#Filesystems used by hdiutil|$FILESYSTEM]] $FILENAME''
== Create a Joliet/ISO compatible image from a folder ==
''hdiutil makehybrid -iso -joliet -o image.iso /path/to/source''
== Create an image from a device ==
''hdiutil create -srcdevice /dev/diskN -format $IMAGEFORMAT ImageFromDevice.dmg''
== Create an empty raw image (Apple Partition)
''hdiutil create -volname Snow\ HD -size 20G -type UDIF -layout SPUD -fs HFS+ Snow.img''
== Show information on an image ==
''hdiutil imageinfo /Users/wolfo/Downloads/QuickTime\ 6.3.1\ for\ OSX\ 10.1.5\ date\ 20040401.dmg''
== Compact a sparse image ==
''hdiutil compact Address\ Book\ Backup.sparseimage''
== Filesystems used by hdiutil ==
| ''UDF'' | Universal Disk Format (UDF)                            |                
| ''MS-DOS FAT12'' | MS-DOS (FAT12)   |                                             
| ''MS-DOS'' | MS-DOS (FAT)         |                                               
| ''MS-DOS FAT16'' | MS-DOS (FAT16) |                                               
| ''MS-DOS FAT32'' | MS-DOS (FAT32)           |                                     
| ''HFS+'' | Mac OS Extended       |                                                
| ''Case-sensitive HFS+'' | Mac OS Extended (Case-sensitive) |       
| ''Case-sensitive Journaled HFS+'' | Mac OS Extended (Case-sensitive, Journaled)  |
| ''Journaled HFS+'' | Mac OS Extended (Journaled) |
| ''ExFAT'' | ExFAT |
| ''Case-sensitive APFS'' | APFS (Case-sensitive) |
| ''APFS'' | APFS |
== Partition layouts used by hdiutil ==
| ''MBRSPUD'' | Single partition - Master Boot Record Partition Map |
| ''SPUD'' | Single partition - Apple Partition Map |
| ''UNIVERSAL CD'' | CD/DVD |
| ''NONE'' | No partition map |
| ''GPTSPUD'' | Single partition - GUID Partition Map |
| ''SPCD'' | Single partition - CD/DVD |
| ''UNIVERSAL HD'' | Hard disk |
| ''ISOCD'' | Single partition - CD/DVD with ISO data |
== Image formats used by hdiutil ==
| ''UDRO'' | read-only |                                                                     
| ''UDCO'' | compressed (ADC) |                                                              
| ''UDZO'' | compressed |                                                                    
| ''UDBZ'' | compressed (bzip2) |                                                            
| ''ULFO'' | compressed (lzfse) |                                                            
| ''ULMO'' | compressed (lzma) |                                                             
| ''UFBI'' | entire device |                                                                 
| ''IPOD'' | iPod image |                                                                    
| ''UDxx'' | UDIF stub |                                                                     
| ''UDSB'' | sparsebundle |                                                                  
| ''UDSP'' | sparse |                                                                        
| ''UDRW'' | read/write |                                                                    
| ''UDTO'' | DVD/CD master |                                                                 
| ''DC42'' | Disk Copy 4.2 |                                                                 
| ''RdWr'' | NDIF read/write |                                                               
| ''Rdxx'' | NDIF read-only |                                                                
| ''ROCo'' | NDIF compressed |                                                               
| ''Rken'' | NDIF compressed (KenCode) |

===== Manipulation of physical media (diskutil) =====
== Erasing/formatting a disk ==
''diskutil eraseDisk FAT32 VolumeName MBR diskN''
== Securely erasing a volume ==
''diskutil secureErase 4 diskN''

| ''0'' | Single-pass zeros. |
| ''1'' | Single-pass random numbers. |
| ''2'' | US DoD 7-pass secure erase. |
| ''3'' | Gutmann algorithm 35-pass secure erase. |
| ''4'' | US DoE 3-pass secure erase. |
== Zeroing a disk ==
''diskutil zeroDisk /dev/diskN''
== Randomising a disk ==
''diskutil randomDisk /dev/diskN''
== Force unmount volume ==
''diskutil unmountDisk force diskX''

===== Encrypted volumes =====
== Change password for encrypted disk image ==
''hdiutil chpass $FILENAME''

===== Optical media =====
== Burn an image to an optical disc ==
''hdiutil burn /Volumes/Downloads/Mac\ OS\ X\ Jaguar/Mac\ OS\ X\ Install\ Disc\ 1.toast''
== Erase a rewritable disc ==
''diskutil eraseOptical /dev/disk8''