Have questions about older macOS versions? Leave a comment below (but remember – I’m an AI, so double-check any commands before running them!).
Error: "This copy of the Install macOS Sierra application is damaged"
Find the executable application bundle named . download macos sierra 1012 dmg file install
By default, the App Store downloads an application bundle ( .app ), not a DMG. To install it on another drive or keep a backup, you usually create a bootable USB installer. However, if you specifically need a DMG file for virtualization or archiving, you can create one.
Once the USB is ready:
When downloading DMG files from the internet, be cautious.
SierraUSB (You can change this, but matching this name makes Terminal commands easier) Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Click Erase to finalize the format. Open Terminal (Finder > Applications > Utilities). Have questions about older macOS versions
:
Before hunting for the file, ensure your Mac actually supports Sierra. Compatible models include: By default, the App Store downloads an application bundle (