How to install OS X 10.10 from USB? I bought a second hand MacBook, that had not had a fresh install of OS X.  The original owner's username and password are in the system. I do not know the administrator password.  I can use the Mac normally by signing in/out without asking for authentication. However when I tried to install some programs, the system asked for authentication, so I decided to reinstall the system.

I downloaded a Mavreicks OS 10.10 from the Internet, then I made a bootable OS X on a USB thumb drive using Transmac software. I logged to my Mac in the Recovery mode booted from the USB. I then erased the main HDD partition and tried to reinstall the OS, but an error msg poped-up saying: 


  Can't download the additional components needed to install OS X.


How can I now do a fresh install of OS X?
Some OS software from another internet source other than Apple is not entirely reliable unless they are a certified Apple seller. In order to get back to the OS you want you can do a few things. Delete the HDD from disk utility and recover it from Internet Recovery. This should bring you to download El Capitan, after that you want to go to the app store and see if you have a version of Mavericks already downloaded, if you go great. If not, you are going to need to buy a copy and then download that onto your USB to reboot from there. Chances are, the copy of Mavericks you have is corrupt in some way or missing essential components.