Disk Utility User Guide
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You can use Disk Utility to create a disk image, which is a file that contains other files and folders.
Note: You can burn information to a CD or DVD using the Burn command in the Finder. See Burn CDs and DVDs.
Create a blank disk image for storage
You can create an empty disk image, add data to it, then use it to create disks, CDs, or DVDs.
- In the Disk Utility app on your Mac, choose File > New Image > Blank Image.
- Enter a filename for the disk image, add tags if necessary, then choose where to save it.This is the name that appears in the Finder, where you save the disk image file before opening it.
- In the Name field, enter the name for the disk image.This is the name that appears on your desktop and in the Finder sidebar, after you open the disk image.
- In the Size field, enter a size for the disk image.
- Click the Format pop-up menu, then choose the format for the disk:
- If the disk image will be used with a Mac that has a solid state drive (SSD) and uses macOS 10.13 or later, choose APFS or APFS (Case-sensitive).
- If the disk image will be used with a Mac with macOS 10.12 or earlier, choose Mac OS Extended (Journaled) or Mac OS Extended (Case-sensitive, Journaled).
- If the disk image will be used with a Mac or Windows computer and is 32 GB or less, choose MS-DOS (FAT); if it’s over 32 GB, choose ExFAT.
- To encrypt the disk image, click the Encryption pop-up menu, then choose an encryption option.
- Click the Partitions pop-up menu, then choose a partition layout.
- Click the Image Format pop-up menu, then choose an option:
- Sparse bundle disk image: Same as a sparse disk image (below), but the directory data for the image is stored differently. Uses the .sparsebundle file extension.
- Sparse disk image: Creates an expandable file that shrinks and grows as needed. No additional space is used. Uses the .sparseimage file extension.
- Read/write disk image: Allows you to add files to the disk image after it’s created. Uses the .dmg file extension.
- DVD/CD master: Changes the size of the image to 177 MB (CD 8 cm). Uses the .cdr file extension.
- Click Save, then click Done.Disk Utility creates the disk image file where you saved it in the Finder and mounts its disk icon on your desktop and in the Finder sidebar.
- In the Finder, copy your files to the mounted disk image, then eject it.
- Restore the disk image to a disk.For more information about disk image types, see the manual (man) page for hdiutil.
Create a disk image from a disk or connected device
You can create a disk image that includes the data and free space on a physical disk or connected device, such as a USB device. For example, if a USB device or volume is 80 GB with 10 GB of data, the disk image will be 80 GB in size and include data and free space. You can then restore that disk image to another volume.
- In the Disk Utility app on your Mac, select a disk, volume, or connected device in the sidebar.
- Choose File > New Image, then choose “Image from [device name].”
- Enter a filename for the disk image, add tags if necessary, then choose where to save it.This is the name that appears in the Finder, where you save the disk image file before opening it.
- Click the Format pop-up menu, then choose an option:
- Read-only: The disk image can’t be written to, and is quicker to create and open.
- Compressed: Compresses data, so the disk image is smaller than the original data. The disk image is read-only.
- Read/write: Allows you to add files to the disk image after it’s created.
- DVD/CD master: Can be used with third-party apps. It includes a copy of all sectors of the disk image, whether they’re used or not. When you use a master disk image to create other DVDs or CDs, all data is copied exactly.
- To encrypt the disk image, click the Encryption pop-up menu, then choose an encryption option.
- Click Save, then click Done.Disk Utility creates the disk image file where you saved it in the Finder and mounts its disk icon on your desktop and in the Finder sidebar.
Important: Don’t create a disk image of a disk that you believe to be failing or that contains corrupted information. The disk image may not serve as a reliable backup.
For technical information about creating a restore disk image, see the Apple Software Restore (ASR) manual (man) page.
Create a disk image from a folder or connected device
You can create a disk image that contains the contents of a folder or connected device, such as a USB device. This method doesn’t copy a device’s free space to the disk image. For example, if a USB device or volume is 80 GB with 10 GB of data, the disk image will be 10 GB in size and include only data, not free space. You can then restore that disk image to another volume.
![Encoding Encoding](/uploads/1/3/4/2/134295183/265904771.png)
- In the Disk Utility app on your Mac, choose File > New Image, then choose Image from Folder.
- Select the folder or connected device in the dialogue that appears, then click Open.
- Enter a filename for the disk image, add tags if necessary, then choose where to save it.This is the name that appears in the Finder, where you save the disk image file before opening it.
- To encrypt the disk image, click the Encryption pop-up menu, then choose an encryption option.
- Click the Image Format pop-up menu, then choose an option:
- Read-only: The disk image can’t be written to, and is quicker to create and open.
- Compressed: Compresses data, so the disk image is smaller than the original data. The disk image is read-only.
- Read/write: Allows you to add files to the disk image after it’s created.
- DVD/CD master: Can be used with third-party apps. It includes a copy of all sectors of the disk image, whether they’re used or not. When you use a master disk image to create other DVDs or CDs, all data is copied exactly.
- Hybrid image (HFS+/ISO/UDF): How to change app language on mac. This disk image is a combination of disk image formats and can be used with different file system standards, such as HFS, ISO and UDF.
- Click Save, then click Done.Disk Utility creates the disk image file where you saved it in the Finder and mounts its disk icon on your desktop and in the Finder sidebar.
Best mac youtube downloader app. For technical information about creating a restore disk image, see the Apple Software Restore (ASR) manual (man) page.
Mac Utility App Encoding App
Create a secure disk image
If you have confidential documents that you don’t want others to see without your permission, you can put them in an encrypted disk image.
![App App](/uploads/1/3/4/2/134295183/185077404.png)
Default Encoding Mac
Note: If you want to protect the contents of the system disk, turn on FileVault using the FileVault pane of Security & Privacy Preferences.
- 3d modelling app mac. In the Disk Utility app on your Mac, choose File > New Image > Blank Image.
- Enter a filename for the disk image, add tags if necessary, then choose where to save it.This is the name that appears in the Finder, where you save the disk image file before opening it.
- In the Name field, enter the name for the disk image.This is the name that appears on your desktop and in the Finder sidebar, after you open the disk image.
- In the Size field, enter a size for the disk image.
- Click the Format pop-up menu, then choose a format:
- If you’re using the encrypted disk image with a Mac computer using macOS 10.13 or later, choose APFS or APFS (Case-sensitive).
- If you’re using the encrypted disk image with a Mac computer using macOS 10.12 or earlier, choose Mac OS Extended (Journaled) or Mac OS Extended (Case-sensitive, Journaled).
- Click the Encryption pop-up menu, then choose an encryption option.
- Enter and re-enter a password to unlock the disk image, then click Choose.WARNING: If you forget this password, you won’t be able to open the disk image and view any of the files.
- Use the default settings for the rest of the options:
- Click the Partitions pop-up menu, then choose Single partition - GUID Partition Map.
- Click the Image Format pop-up menu, then choose “read/write” disk image.
- Click Save, then click Done.Disk Utility creates the disk image file where you saved it in the Finder and mounts its disk icon on your desktop and in the Finder sidebar.
- In the Finder , copy the documents you want to protect to the disk image.
- If you want to erase the original documents so they can’t be recovered, drag them to the Trash, then choose Finder > Empty Trash.
When you’re finished using the documents on the secure disk image, be sure to eject the disk image. As long as it’s available on your desktop, anyone with access to your computer can use the documents on it.
To access the data in a disk image, double-click it. It appears on your desktop, and you can add, remove and edit files on it just as you would with a disk.
See alsoAdd a checksum to a disk image using Disk Utility on MacVerify that a disk image’s data isn’t corrupted using Disk Utility on MacRestore a disk image to a disk using Disk Utility on MacConvert a disk image to another format using Disk Utility on Mac
Versions history
Version 2.3.2
Available for macOS 10.12 (Sierra) and higher- New features :
- Subtitles display can now be restricted to the normal size, and to the video bounds.
- Subtitle edition can now be independent from subtitle currently playing.
- Edited subtitle is now highlighted in the timeline.
- Clicking on a subtitle in the timeline now selects it for edition.
- Added 'Change couples of markers to subtitles' menu and keyboard shortcut.
- Default end marker and default second anchor marker in 'ReSync' popover are now set to last marker.
- User's manual has been updated.
- Fixes :
- Now correctly selecting the default encoding at export.
- When no video was loaded, clicking on a subtitle made the counter run. Not anymore.
- Fixed a display bug with automatic Dark/Light mode selection.
- Corrected some bugs appearing when video is shorter than subtitles file.
- New features :
Version 2.3.1
Not available anymore, replaced by newer version- Fixes :
- Fixed annoying bug when deleting subtitle.
- Fixes :
Version 2.3.0
Not available anymore, replaced by newer version- New features :
- Now displaying sound waveforms to help positioning subtitles.
- Dark mode (for macOS 10.14 Mojave and higher only).
- Full Touch Bar support.
- Subtitles are now displayed on the video, and markup properties are correctly rendered.
- Subtitles included in video files can now be played.
- Smoother backward play.
- VLCkit has been replaced by mpv/ffmpeg, providing much more functionalities for Subs Factory development.
- New 'Subtitle' menu for subtitle edition, with associated keyboard shortcuts.
- Time counter is now editable to quickly go to a precise timing.
- New features :
Version 2.2.1
Available for macOS 10.11 (El Capitan)- New features :
- MicroDVD (.sub) and Tab Separated Values (.tsv) export
- Command buttons icons are now retina.
- Fixes :
- Using 'Enter' when editing a subtitle in the 'Editor' palette now creates a new line.
- Text edition in the 'Editor' palette now taken into account right away.
- Some other minor bugs fixed.
- New features :
Version 2.2.0
Not available anymore, replaced by newer version- Reliability, ease of development, modernity and future-proof: the application has been translated to Swift, and the whole code has been reviewed for more simplicity and a much better ability to evolve.
- New features :
- Now all actions are undoable : resync, split, merge, replace,..
- User interface improvements for better readability.
- It is now possible to play the subtitles, even without a video.
- Performances improvements.
- Fixes :
- Numerous bugs have been fixed.
Version 2.1.5
Available for macOS 10.9 (Mavericks) and 10.10 (Yosemite)- Fixes :
- A bug preventing use of 'Editor' palette with systems older than macOS 10.14 (Mojave) has been fixed.
- Implementing Internet Access Policy for Little Snitch.
- Some crashes fixed.
- Fixes :
Version 2.1.4
Not available anymore, replaced by newer version- Fixes :
- A bug preventing resynchronization has been fixed.
- A bug altering the display of subtitles table after file split has been fixed.
- A bug happening when no video file was loaded has been fixed.
- Another crash has been fixed.
- Fixes :
Version 2.1.3
Not available anymore, replaced by newer version- Fixes :
- A bug modifying a subtitle date when clicking in the table has been fixed.
- Some other crash causes have been fixed.
- Fixes :
Version 2.1.2
Not available anymore, replaced by newer version- Fixes :
- Some bugs concerning subtitle edition have been fixed.
- Fixes :
Version 2.1.2
Not available anymore, replaced by newer version- Fixes :
- Some bugs have been fixed, including concerning 'Search and Replace' function.
- Fixes :
Version 2.1.0
Not available anymore, replaced by newer version- New features :
- Most video files are now played natively (thanks to VLCkit, replacing QuickTime).
- Now compatible with systems from macOS 10.9 Mavericks to the current release, 10.14 Mojave.
- It is now possible to choose which audio or video track to play in multitrack files.
- Latest news are fetched and displayed at application launch.
- Video speed management is now more flexible with J-K-L keyboard shortcuts and new controls on video controls palette.
- More flexible resynchronization function.
- Fixes :
- A lot of bugs have been fixed.
- New features :
Version 2.0.3
Available for macOS 10.6 (Snow Leopard) to 10.8 (Mountain Lion)- New features :
- It is now possible to choose an encoding when exporting a .srt file,
- the encoding chosen while opening a file is now memorized,
- the encodings list is now much more comprehensive.
- Fixes :
- Markers are now correctly saved in project files,
- Subs Factory now correctly asks for saving when closing a project,
- minimum duration of a project without video is now ten seconds,
- palettes list is now always entirely unfolded,
- other minor bugs have been adressed.
- New features :
Version 2.0.2
Not available anymore, replaced by newer version- Fixes :
- Subtitles files created from scratch can now be exported with Snow Leopard,
- one-key shortcuts (i, o and space) now work correctly,
- ReSync window now works correctly with Snow Leopard,
- there is now a protection preventing entering a subtitle whose end is after its beginning,
- video is now correctly unloaded when changed or when closing the window,
- other minor bugs have been corrected.
- Fixes :
Version 2.0.1
Not available anymore, replaced by newer version- Fixes :
- The markers menu now works,
- m4v files can now be open,
- fixed project video loading after application relaunch,
- fixed export button that did not export correctly, and
- window minimum size now better computed.
- Fixes :
Version 2.0
Not available anymore, replaced by newer version- First version on the Mac App Store, rewritten from scratch and dramatically modernized.
Version 1.3.2 and older
Available for macOS 10.2 (Jaguar) to 10.5 (Leopard)- See old version webpage.