create bootable mac os el capitan installer

(also feel free to throw a virtual tomato at me for being dumb. Download DiskMaker X Download macOS from App Store into Applications folder Do NOT run installer Attach a USB drive Using Disk Utility erase USB drive. How to Create a Bootable Mac OS Installer from Ubuntu Linux Format a > 32gb USB drive as ExFAT Download El Capitan ( InstallOSX.dmg ) to the USB drive.

I'm sure there has to be some little-documented way of actually accomplishing this. Choose a version as per your requirement. 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. How to make a macOS bootable USB installer First, download a copy of Disk Maker from the official website.

I have a brand new iMac running MacOS Monterey. 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. Then the installer app can be used to create the bootable USB device. Applications/Install OS X El Capitan.app.

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. Select Free Upgrade, it will download the installer app for El Capitan. 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.

Create bootable mac os el capitan installer