Life In 19x19

sorry it's not exactly a go problem but it is making it impossible for me to download problems or use applications related to the study of said art.
My Mac states repeatedly that my password is invalid.
I have changed it three or four times. the password works perfectly on my iPad and on the Macs in theApple shops, so the problem is strictly my computer. I have no access to technical support and I need applications to copy igo lessons and so on.
Please can somebody help me.....
Cheers,
Buri

I would de-authorize and re-authorize the computer, but this is strictly an idea that I do not approve or endorse in any way (authorizing is either in the Mac App Store or in iTunes)

If what RBerenguel suggested doesn't fix it....

What exactly are you having a password problem with? OS or something like a Mac store (if there is one, I don't know)?

Do you have caps lock on while entering the password, or some sort of hardware failure with your keyboard?

greetings,
many thanks to you both. the Mac simply wouldn't accept the password.
I fumbled my way into account settings and administrator password and retyped it. that solved it.never had that problem before.usually a password change is automatically Okay.
now if only I could fix my igo....
cheers,
buri