I have recently done a clean reinstall of OS X to fix my corrupted drive and everything is fine running Mavericks. However, I have been trying to upgrade to Yosemite, first by downloading from App Store and then installing from there, and then by creating a bootable usb, only to be met both times with the error,
"This copy of the Install OS X Yosemite application can’t be verified. It may have been corrupted or tampered with during downloading"
Again, I tried this with an El Capitan installer from the app store, and both methods gave the same error
Any advice is appreciated.
Note: My data and time is correct - updated automatically so this is not the issue