I want to wipe my HD clean. Command R won't bring up disk utility, it just keeps spinning on the Apple logo. I'm running 10.9.3 on a macbook pro.

I want to wipe my HD clean. Command R won't bring up disk utility, it just keeps spinning on the Apple logo. I'm running 10.9.3 on a macbook pro.

Select the Recovery partition. It should boot to a screen like this:
Select Disk Utility and reformat your boot drive, formatting with a single GUID partition as "Mac OS Extended (Journaled)". Once the partition is erased go back to Reinstall Mac OS X and install the OS on your newly formatted partition. It may take a while and if you downloaded Mavericks from the Mac App Store (duh!) you may need your Apple ID and password handy.
Installing the OS may take quite some time as it will necessitate downloading the 5GB+ OS file.
Now you'll be able to make a clean installation of everything.
Clinton

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