Looking for scanner recommendation.

I have a barely used Opticbook 4800 scanner for sale, but it's not portable.

The CanoScan LiDE 220 should be compatible with Mac OS. I just Googled it, since that's the scanner I have, and Cannon's support page mentioned being compatible with Catalina. Here's the link with all the info.
https://canoncanada.custhelp.com/app/answers/answer_view/a_id/1012430/~/canoscan-lide-220-full-driver-%26-software-package-%28mac%29

I hope this helps. I really like my LiDE 220. It's a good little scanner that hasn't failed me yet.

By the way, there's a lock switch on the underside of the scanner. With the scanner buttons closest to you, feel along the underside of the scanner, and you'll feel a large, flat switch. If you have it to the left, the scanner will be locked. I do this when I'm carrying the scanner or packing it to take to school or something like that. If you have it to the right, the scanner will be unlocked, and is now ready to be used. I'm letting you know this in case you didn't know, like I didn't know, until I found out the hard way. I accidentally tried running my scanner when it was locked once, and I'm very glad there was no permanent damage to it.

Thanks,
Shersey