I owned an XP60 for a number of years and did alot of sequences on it. I was trying to find a way that I could move those sequences up to my current setup, which consists of a Korg PA700 and many other synths, but the PA700 is the main sequencer.
I ended up downloading a program that converted the .svq files from the XP60 to a .mid format and then I could update them on the PA700. I also used a USB floppy drive plugged into my Windows laptop to load the .svq programs to the PC for conversion. I also used a CD-ROM disc, as I had archived much of my music stuff onto CD back then. I simply loaded the CD-ROM into the laptop and it worked the same as the floppy drive did.
I used Awave Studio software, in trial mode, until I was finished converting everything over. I believe that I had 30 days to try the software. Since I was finished, I never bought the software and simply uninstalled it. According to their website, it is only available for Windows machines, but maybe you could run Bootcamp and create a partition on your Mac that would allow you to run Windows. Maybe you could run a virtual machine on your Mac to do the same thing.
The Awave Studio software runs around $100 USD, and I feel that is a bit pricey, but it will convert more than just the Roland files.
If you still have the XP80, then maybe you could clean the floppy drive and see if that helps or not. Maybe the drive belt has gone bad inside the drive. They do deteriorate and/or stretch out after a while and would need to be replaced. If your floppy discs were stored well and protected, they may still work. Among the many synths in my collection is an Ensoniq VFX-SD. It is over 30 years old now. ALL of the floppies that I used for it are still readable and I can still write to them. If you took care of the media, then they might still work as well, if you decide to take a look at the floppy drive in the XP80.
I checked another thread about another opst like this in the past, but it offered very little that is not already in this thread.
Maybe some of what I wrote will help a bit.
Grace,
Harry