I have a macbook tiger, and i have changed my password but i have forgotten it now. is there a way to recover it?
If you have your restore disc's, boot into it. I haven't done this in a while but once you have booted into it, up in the menu bar up top where you see file edit help and other stuff, you should click one of those and a menu will drop down and you should see reset password. click that and do what it tells you. I haven't done this in years so my memory is iffy.
if you don't have a disk (or don't feel like digging it out) you can boot into single user mode and reset the password (this is for 10.5, 10.4 is a little bit different, still works though)
press Command-S while starting up to boot into single user mode
Type fsck -fy
Type mount -uw /
Type launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist
Type dscl . -passwd /Users/username password, change username and password to your username and new password (whatever you want)
restart