I need to use another Mac to connect via LocalTalk, download the operating system, write the 800k floppies, and put them into the SE.

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Nooooo. Either Localtalk or floppies. You only need to get one method working to get the images onto the SE. As I explained, perhaps too briefly, above.

Either:

• A Mac on the internet, with a floppy drive
  
• Download the 6.0.8 800k disk images on that Mac
  
• Make 800k floppies on that Mac, and you're done.

Or:

• A PC on the net
  
• A Mac with a floppy drive (your 610 would do perfectly)
  
• Download the 6.0.8 800k disk images on the PC
  
• Transfer the images to the 610
  
• Make 800k floppies.

In fact, Localtalk is a complete waste of time. Forget anyone even mentioned it.

The 610 can:

read PC floppies or connect to the PC via ethernet to receive the disk images

and

make 800k floppies.