Clean Install Issues

[Futhark]

I've just made a bootable USB version of OS X Lion and went to do a clean install to leave my iMac like a brand new machine with nothing else on it.

I powered off my iMac and plugged in my USB Pen Drive and started the iMac while holding down the ALT key which brought me up the menu where I booted from my Pen Drive.

I selected Clean Install from the menu that appeared and after quite some time OS X Lion installed but with all my User Accounts and Data still there ?

What have I done wrong? Would it be ok just to create a new User Account and delete the old ones or is it best to reinstall again?

 

[simsaladimbamba]

The following steps should also apply for Mac OS X 10.7 Lion:

To create a Clean Install (formerly known as Erase & Install) of Mac OS X 10.6 Snow Leopard (the 29 USD Upgrade DVD is a fully working retail version of Mac OS X and does not need a prior installation of Mac OS X on the Mac), follow one of the following guides:
Short version: Clean Install of OS X 10.6 Snow Leopard
Long version: Mac OS X v10.6 Snow Leopard: How to Erase and Install​

 

[wrldwzrd89]

The following steps should also apply for Mac OS X 10.7 Lion:

The way you get to Disk Utility is a little different in the Lion installer. Besides that, it's all the same.

 

[Futhark]

Many thanks for the prompt reply !!! I see where I've gone wrong, I didn't use Disk Utility to Erase the Drive first.

Many Thanks for your help.

 

[simsaladimbamba]

The way you get to Disk Utility is a little different in the Lion installer. Besides that, it's all the same.

Is there no Utilities section in the Menu Bar anymore?
How do you get to Disk Utility in the Lion installer then?

 

[wrldwzrd89]

Is there no Utilities section in the Menu Bar anymore?
How do you get to Disk Utility in the Lion installer then?

There's an extra step now, you must select Utilities from the recovery screen first. Then it'll let you select Disk Utility from the Utilities menu as normal.

 

[Futhark]

My install worked a treat this time and actually installed so much faster this time compared to the last time.