- 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 copy of the Install OS X Mavericks application can’t be verified. It may have been corrupted or tampered with during downloading” The reason why this insane message is happening is because as of February 2016, the security certificates that validate these Mac OS X installs seems to have expired. Question: Q: Failed attempt to install El Capitan, now cannot restart in previous version. I tried to upgrade to El Capitan from OS X 10.6.8, which I realise is not possible. On restart, Mac keeps trying to install it and now I can't get back into my Mac at all. I'm trying to upgrade from Yosemite 10.10.5 to El Capitan but get message saying it cannot be installed on this - Answered by a verified Mac Support Specialist We use cookies to give you the best possible experience on our website.
IMAC (RETINA 5K, 27-INCH, LATE 2015), macOS Sierra (10.12.3)
Posted on Feb 28, 2017 9:53 PM
Mac OS X System Preferences Crashing? Here’s a good trick to try.
El Capitan Cannot Be Verified For A
Do you find that the System Preferences application on Mac OS X keeps crashing when you either open it, or, try to access any of the individual system preference panes in the window? Here’s something to try if you find yourself with this issue.
First, you are going to be using the Mac OS X Terminal application, which is located in the Utilities folder inside of your Applications folder. You would want to back up any important data before doing these steps, hopefully with Time Machine and an external disk. We are not responsible for any data loss.
Here’s What to Do To Fix Your System Preferences–Proceed Carefully.
You are going to want to select the line of code below, and copy it to the clipboard (edit menu –> copy), so we can paste it into the Terminal window. This will move a possibly corrupt system preferences plist file to your desktop.
At this time, you will want to paste this code into the Terminal window by choosing “paste” from the edit menu. You can now hit the “return” key on your Mac OS X keyboard, which now should move this file to your desktop. Leave it on the desktop for now. At this time, you will either want to logout of your Mac, by choosing “logout” in the Apple menu (and then logging back in from the login window) , or, simply choosing “restart” from the Apple menu. When the Mac comes back to your desktop, you can then try to launch system preferences once again. If all goes well, you will now have full control over the system preferences in question.
If this does not work, and you want to return this file to its original place, you can copy and paste the line of code below into the Terminal once again. If this trick worked, please leave a comment so other readers can decide to try it or not.