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In the Disk Utility app on your Mac, choose Images > Resize, select the disk image file you want to resize, then click Open. Type a new size, then click Resize.
Are you wondering, can you delete DMG files after installing a new app? The quick answer is, yes, removing DMG files will not affect or damage your Mac or newly installed app. Keep reading for more.
I currently use hdiutil to create my DMGs.
The command I use is hdiutil create -size xxxg myImage.dmg -fs HFS+. I'm always left fidgeting around with the size until I get it close enough.
Is there a better method that either shrinks the DMG to size or creates it size?
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