Cant access my inotebook (ive forgotten my login password)

[BRASS EAGLE]

Hi can any one assist me, ive forgotten my login details on an imac notebook,its a Modle M6497,if i have to format it ,can any one tell me how to do that and put a new operating system on to it i think the one on it is os x

[plasterer]

Must be some password recovery software out there for
your notebook mate
Try Google for help ..................Paul