I have a GREAT SOLUTION to the BAD DATA 502 issue, thanks to an Apple tech consultant. And it is a rather simple one. Create a "NEW USER" account for yourself on your MacBook. Then, whenever you need to log into the problematic web site, simply use it instead id your regular user account. Now, if I can just learn how to share all files between these two user accounts, life will be even simpler.
To add a user
- On your Mac, choose Apple menu > System Preferences, then click Users & Groups . ...
- Click the Add button below the list of users.
- Click the New Account pop-up menu, then choose a type of user. ...
- Enter a full name for the new user. ...
- Enter a password for the user, then enter it again to verify. ...
- Click Create User.
- Then log into the problematic web site as usual
GOOD LUCK
Brendan