hdiutil detach /Volumes/Install\ macOS\ Catalina

If you do not have a Mac to create the file, you can download pre-converted ISO files. These are often hosted on software archives like or IntofilePC .

hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr

You will need to use Terminal commands to convert the .app file into an ISO/DMG.

# Create a blank disk image hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J

macos catalina iso
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Jeremy Willard is a Toronto-based freelance writer and editor. He's written for Fab Magazine, Daily Xtra and the Torontoist. He generally writes about the arts, local news and queer history (in History Boys, the Daily Xtra column that he shares with Michael Lyons).

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Macos Catalina Iso ^hot^ Jun 2026

hdiutil detach /Volumes/Install\ macOS\ Catalina

If you do not have a Mac to create the file, you can download pre-converted ISO files. These are often hosted on software archives like or IntofilePC . macos catalina iso

hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr hdiutil detach /Volumes/Install\ macOS\ Catalina If you do

You will need to use Terminal commands to convert the .app file into an ISO/DMG. macos catalina iso

# Create a blank disk image hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J