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Not a disk image
- It must be an installer app, not a disk image (.dmg) or package (.pkg) that contains the installer.
support.apple.com/en-us/101578
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Do I need a dmg file to install El Capitan?
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Sep 16, 2024 · To get the installer from the disk image, you must use a Mac that is compatible with that macOS. Use these links to download a macOS disk image (.dmg) file. If these links don't work as expected, try again using Safari, which is in your Applications folder. Sierra 10.12. El Capitan 10.11. Yosemite 10.10. Mountain Lion 10.8. Lion 10.7
Sep 16, 2024 · You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or if you can't install a compatible macOS from the Finder or macOS Recovery. Download a full macOS installer from Apple.
Sep 6, 2020 · The .dmg file is not needed once the installer app is in the Applications folder. As @Eau Rouge mentions if you are downloading the El Capitan .dmg installer file there are several steps which must be done before the installer shows up in the Applications folder.
- Here is the official Apple article on how to create a bootable macOS USB installer: https://support.apple.com/en-us/HT201372 You can use a bootable...
- You downloaded the correct full installer contained in the InstallMacOSX.dmg. When you open that to the InstallMacOSX.pkg you then open that and yo...
- @Eau Thank you, I poked around the 'net after posting here and found instructions on: creatinstallmedia via Terminal So shall use that to have on a...
- @HW Thank you. InstallMacOSX.dmg does not reside on the computer that has Install OS X El Capitan.app within it's application folder. Can I assume...
- As long as the "OS X El Capitan.app" is complete and there is no corruption, then it should be usable to make a USB installer. The .dmg file is not...
- Installer should be ok, just checked it is 6GB+ Plan to put on an external HD partition. Many Thanks too ALL
- I have given you the full instructions above, have you read them.
The installer for OS X El Capitan downloads to your Downloads folder as a disk image named InstallMacOSX.dmg. To get the installer: Download using Safari, and open the disk image on a Mac that is compatible with OS X El Capitan. Inside the disk image is an installer named InstallMacOSX.pkg.
Sep 30, 2015 · Apple has now made the El Capitan file from their website into a .dmg file. In order to use this file to create a bootable drive, you must do these steps before you are able to use the createinstallmedia command. Step 1: Obtain the El Capitan file from Apple as mentioned above. Step 2: Run and mount the InstallMacOSX.DMG file.
An InstallMacOSX.dmg file for OS X El Capitan, can be downloaded from the Apple website How to download macOS. While this file can be restored to a flash drive, the result is not a working OS X El Capitan USB installer. The same is true for the macOS Sierra file InstallOS.dmg file, which can be downloaded from the same Apple website.
Oct 1, 2015 · In this step-by-step guide we're going to show you how to download the OS X 10.11 installation package and – with the help of a simple tool called DiskMaker X – perform a clean install of El...
