Hello Michael, and thank you for choosing JUSTANSWER.com
Im sorry to hear your having so much trouble, as online banking can be VERY secure, and therefore, can be very difficult to satisfy all the requirements.
With that in mind, are you able to take any screenshots of the error messages, and upload them here?
Also, i was able to find the requirements for ONLINE BANKING FOR WELLS FARGO.
Your need to have OSX Version 10, and the Safari Browser needs to be at least Version 6, and only up to Version 8.