Re-set pass word

[TomT321]

I purchased a used IMac and the previous owner had the pass word set up to just be blank, I had an external hard drive on the IMac but have since gone to a new Mac Mini and I had the Apple store just transfer all of my data over to the new Mac from the external hard drive. Not that it doesn't work, but how do I change the pass word to something of my choosing rather just leaving it blank?

 

[RKO]

System Preferences - Accounts - Change Password

 

[eawmp1]

Can't you just wipe the iMac hard drive, reinstall system software, and start from scratch with your own admin password?

Otherwise, you could just have Googled the answer:
http://support.apple.com/kb/HT1274

 

[Angelo95210]

Anyway it's always good to make a clean install when you buy a used mac...