Question: Installing Yosemite fails
I am trying to install Yosemite on a MBP 17" from 2010.
I have erased the harddisc and and tried to install via wifi. The installer says that it can't approve the installation and I should try again – I have tried many time over 24 hours, and always the same.
The I have created a bootable USB installer, and now it says that the installer can't be checked and it might be broken og damaged. I then made a new USB, but still the same...
What should I do? Please help!
MacBook Pro, OS X Yosemite (10.10)