How can I get an old mac with 9.1 on the Internet to upgrade it. There is on ethernet port or USB port....only a CD-ROM drive.

No MacBook has OS 9.1

It would help if you figured out what the age of your machine was, and what model it was according to these guidelines:

http://discussions.apple.com/docs/DOC-6413

The three notebooks which may have had Mac OS 9.1 have these identifier articles as well, which you can also

look on the frame of your screen:

http://support.apple.com/kb/ht2287 - Powerbook G3

http://support.apple.com/kb/ht3065 - Powerbook G4

http://support.apple.com/kb/ht1772 - iBook

Also, the only Mac laptops with a built-in CD-ROM drive but without both USB and Ethernet ports (and capable of running Mac OS 9.1) would be some PowerBook 1400 and 3400c variants. These models cannot be upgraded to Mac OS X. However, it would be possible to connect the computers to the Internet for other purposes via separate network PC Cards (Ethernet or wireless). So, as already mentioned by a brody, details about the computer in question would really help.

Jan

Scrap that post.

I've seen a few Wallstreet notebooks without a working Cat5 connector that some people have removed or replaced with a 56k modem.