I'd be able to do a clean install of El Capitan * without * destroy my Windows partition?

I bought this media 2011 27 "iMac used earlier this year as a refurb from a dealer. It came with El Capitan installed, but I have the feeling that they had a facility upgrade compared to a clean install. The computer suffers from slow start and loading slow program (but once it loads then its fine). 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. So I thought it wouldn't hurt to try a clean install on this machine.

But 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?

Yes, I've run disk utility and checked my HHD drive, it works fine. 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.

I also recently created a Windows partition and installed Windows 8.1. It starts and runs decently faster than OSX, so I think it's just a problem with OSX and not the HHD himself and do a clean install will be hopefully solve problems. This computer has given me a lot of grief, creating a partition to install Windows 8.1 (unlike my old iMac) so wouldn't really really really have to wipe the HHD together to "change the property" and having to mess with which once again...

It 'sounds' like since the app store IS letting me install OS and updates to program with my Apple, I SHOULD be able to start in the RecoveryHD Partition and ID here to make a new install of Mac OS x on * just * my existing Mac partition. And this should not erase my * any * HHD, just the Mac partition. I'll save my whole Windows partition just to be safe, however. I could not find a guide which deals specifically with only reset the OSX partition and not wipe out Windows in the process, so I want to make sure I have my facts straight. I had planned on OSX reset and then restore my files with Time Machine. However, I also want to assure you that this will allow me to go even and reset the OS in the first place, given that I am not the original owner of the iMac and I don't know if they reset it correctly.

Sorry for the extremely long question and TIA!

Open the Mac App Store, make sure that you are signed in with your Apple ID and click on the purchase tab to see if El Capitan is associated with your Apple ID. If this isn't the case, you will need to download it so it will be associated with your Apple ID. If this is the case, you are all ready.

Are updates to OS X, not the buyer, so you can install all the updates, but the OS needs to be associated with your Apple ID.

I'm not sure about Windows, how did you install Windows? With Boot Camp? You should be able to clone on another drive (if you have one) using Clonezilla. Then wipe and reinstall El Capitan and put in place the Boot Camp partition and clone back.

Tags: Mac

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