clean install os x el capitan without usb

I also recently created a Windows partition and installed Windows 8.1.

The entire machine is nice and quiet, not making abnormal sounds or perform exceptionally, it's just really the slow start in OSX and slow loading programs that are the problem. Yes, I've run disk utility and checked my HHD drive, it works fine. So I thought it wouldn't hurt to try a clean install on this machine.īut read the tutorials I noticed that if you are not the first owner of the computer, then you cannot install updates OSX without resetting the computer? Although I WAS able to install the OS via the App Store updates (and I thought that I linked my Apple ID to the machine when I put initially in place), won't install not mean I should be able to clean, or it will have to be completely reset? It's the same with my old iMac when I did an upgrade to Leopard years ago snow leopard, and erase the disk and performing a clean install OSX (and put files and programs back with Time Machine) has solved these problems then. The computer suffers from slow start and loading slow program (but once it loads then its fine). It came with El Capitan installed, but I have the feeling that they had a facility upgrade compared to a clean install. I bought this media 2011 27 'iMac used earlier this year as a refurb from a dealer. I'd be able to do a clean install of El Capitan * without * destroy my Windows partition?

Clean install os x el capitan without usb