This downloads InstallMacOSX.dmg to your Downloads folder. Go to Section 4 and click on Download OS X El Capitan.
How to upgrade to OS X El Capitan – Apple Support (you do not need to reset the date and time for this method) You can download El Capitan with the new certificate from here, Yes El Capitan can be installed on that iMac, you used a USB you already had, but if this had beenĬreated before October 2019, it would fail because the certificate for it has expired, that is mentioned There could be dozens of reasons why it may not work.
If I use that to install and turn off Wi-Fi, do you think that will work, or will the install process stil need to use the internet for some kind of validity check? I assume I could then put that on a flash drive. I have ordered the Lion installer and I'm told I will get it via email in 2-3 days.Any way to avoid that reverting to today's date? Her iMac is on a different floor from her router, so I have to use Wi-Fi.
When I tried to install it via USB, I got an error message that I didn't think to write down, but I'm pretty sure that it said this OS couldn't be installed on this computer.
The certificates for several of Apples OS's expired in October 2019, Apple have been very poor at getting these updated on their Recovery Servers with valid certificates.
If you want to try internet recovery follow this,
You will e-mailed a redeem code which you use in the App Store (not the Apple Online Store).įrom macOS Sierra Apple stopped the Purchased section of the App Store showing previously downloaded Mac OS X Lion is only available as a $20 from the Apple Online Store (not the App Store) when you purchase