macOS Sierra Installer Stuck

I recently erased everything on my HDD from my 2011 iMac and am now trying to reinstall macOS Sierra using recovery mode. Every time I try to reinstall macOS it gets to 100% but then displays the time remaining in negative seconds. I checked the logs and it says that it "Couldn't mount dmg! (error code 110). I was wondering if there is a fix to this or if there is a way I can create a usb that could install macOS Sierra.


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Posted on May 26, 2023 07:52 PM

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May 26, 2023 08:31 PM in response to evan-

Create a bootable installer for macOS - Apple Support


Sierra won’t install to SSD, thanks to Eau Rouge…

https://discussions.apple.com/thread/251358124?answerId=252770772022#252770772022


Open Terminal (Applications/ Utilities) now copy and paste this command into the Terminal window,


sudo plutil -replace CFBundleShortVersionString -string "12.6.03" /Applications/Install\ macOS\ Sierra.app/Contents/Info.plist


press return

enter your password

press return


Now paste in the createinstallmedia command for Sierra where MyVolume can be replaced with the name of your USB stick


If your USB name has more than one word separated by spaces you would need to type it in as


/The\ USB\ Name


sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app


press return 

follow the prompts


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macOS Sierra Installer Stuck

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