I'm having trouble setting up my email for my Mac, it's version 10.7.5 I received my brother-in-law's old Mac as a gift. When we tried to switch from his email to mine, the app won't accept my password or connect online. Does anyone know to fix this? The Mac still has his name and email address as the default even though I've changed to my Apple ID and everything.





I brought the Mac to my campus tech guy, but all he could suggest was hard resetting the computer, which is something I don't want to do.
If you need anymore photos for clarity, let me know and I'll be happy to edit my question with more.
First, remove his account from the list of accounts in preferences.


Go to Mail > Preferences [command ⌘+,
Go to the Accounts tab [Looks like an @ symbol]
Select his old account
Click the Minus button at the bottom of the list to remove his account [see picture below]





Now, add your email account.  Note: Not to be confused with your Apple ID and password.  Even if your Apple ID is the same as your email, the passwords may be different.  One accesses Apple services (iCloud, iTunes etc.) the other is your email account.