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- I am trying to upgrade an older iMac (2008) from OS 10.6.8 to El Capitan for a disabled client who really needs to use a Mac instead of a PC!
- EveryMac says it can handle El Capitan if I upgrade RAM. It has 4GB now.
- I have an Installer file from my own Mac (always keep them when I upgrade). I made a bootable flash installer that mounts and seems to have the proper files, but it won't show up on either Mac on restart holding option key; nor in the Startup Disk list. So, I figured writing to the flash drive must have failed.
- I partitioned an external hard drive and redid this:'sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El Capitan.app'
- It seems to work (again) in Finder AND it shows up as a boot option on restart (holding option key), but when I select Install OS X I get an error that the installer cannot be verified. I can't get it to work.
- So, I figured my installer must have gone bad, even though I successfully upgraded my own Mac with it, and have since upgraded mine to Sierra.
- Using the App Store I can get to El Capitan, but it will not allow me to download it on my Mac because the system is too new, and I don't want to download it to the old Mac because I want to use an external drive to do a clean install; not an upgrade on the old one.
- Any advice?
This should work if you had downloaded El Capitan previously on your Mac. Alternatively you could download El C on your friends Mac. Don't install as you want to do a clean install. Once downloaded move the Install Mac OS X El Capitan.app to your Mac, and then create a new bootable USB, Create a bootable installer for macOS - Apple Support.
- El Capitan was only ever available as a free download direct from Apple, if you are buying it or any 'recovery' DVD you are being ripped off. To download El Capitan, read this, How to upgrade to OS X El Capitan - Apple Support scroll down to Section 4 and click on Get El Capitan.
- Make sure the El Capitan installer (or at least a copy of it), called Install OS X El Capitan.app, is in its default location in your main Applications folder (/Applications). Select the text of.
Download El Capitan Mac Os Installer Mac
IMAC (RETINA 5K, 27-INCH, LATE 2015), macOS Sierra (10.12.3)
Download El Capitan Without App Store
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