(also feel free to throw a virtual tomato at me for being dumb. I'm sure there has to be some little-documented way of actually accomplishing this. How do I create an OS X El Capitan installation media from an iMac running MacOS Monterey? The new iMac won't run the El-Cap installer package inside the. In the range of this writing, we will show you how to make an USB installer for Mac OS X 10.11 El Capitan using 2 different methods: DiskMaker X and. I have a brand new iMac running MacOS Monterey. The copy of the install app self deletes after installing El Capitan, so make sure you keep a copy of the InstallMacOSX.dmg if you need it in future, or you could just make a copy of the Install OS X El Capitan. Now I have an '09 iMac (iPaperweight) with no OS, and it won't let me download OS X from the App Store through recovery because apparently that's no longer available (?).īut. To start the installation of El Capitan double click on the Install OS X El Capitan.app. Go to Applications/Install OS X El Capitan and. Turns out it didn't, and then I ruined it anyway by trying to change the partition size/filesystem type from 64 GB OS X Journaled to ExFAT 12 GB (I'm not sure why on earth I thought that would work and not erase the partition. After downloading, it will automatically launch the upgrade installer. Here are the steps to create an OS X El Capitan USB installer. So, I did the dumb, I erased the HDD on an '09 iMac (El Capitan) without verifying that the third-party-created thumbdrive installer (DiskCreatorX) actually worked as a bootable drive on the machine. We’ve previously covered the steps for making your own USB installer for Mavericks and Yosemite, and now that OS X El Capitan is available for developer testing, it’s time to update those instructions.
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February 2023
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