To resize (change 25G to whatever you want), hdiutil resize -size 25G /PATH/TO/DISK/IMAGE.dmg Another way to compress it is to clone your disk image into a sparsebundle, then compress the sparsebundle. This may or may not work, depending on how much compression takes place.
I played with this a little with a test .dmg file similar to yours. There may be a problem with Disk Utility's Resize function, but you can work around it.
Resizing the .dmg image file and resizing its contained partition are separate procedures. You can see them both if you click on the little triangle in Disk Utility's Resize window:
- Basically, the DMG file extension can be compared to the EXE or ISO format of Windows and can even function as a complete virtual drive for the system. The mimicking of physical CD drives is a workaround implemented by the system to address problems that may arise from CD requirements of some software programs including support for the.
- The DMG files normally contain program installation files for Apple system and applications, but they can also be used to hold compressed files. With PowerISO, you can manipulate dmg files on Windows PC. PowerISO can burn dmg file directly to a CD / DVD disc. You needn't convert dmg to iso file.
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How To Resize Cd Dmg File Windows 10
After doing this, you see the following. The button to resize both the image and the partition is selected by default, which is what you want:
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However after clicking the Resize button, my result was the same as yours - only the .dmg file was resized, not the contained partition.
Resize Dmg File
To try to fix this, I did the following. Mount the image by double-clicking the .dmg file, select the .dmg file (upper icon) in the left pane of disk utility, and click the Partition tab. I was then able to pull down the lower-right corner of the partition graphic to fill the entire space.
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This increased the size of the partition to the same size as the image file. I then clicked Apply.
How To Resize Cd Dmg Files
When I later checked the mounted partition in Get Info, it reported the new larger size of 5GB.
How To Resize Cd Dmg File Player
Mar 18, 2012 4:33 AM