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Whelp, unfortunately, even with the new SIT file and all extensions disabled, I still get the unimplemented trap error. I suppose I could install MacsBug and see what it's getting hung up on. Do you think it's possible that my Plus not having the v3 ROM might affect things? I wouldn't see how...

Resource forks are perfectly safe in macOS last I checked, unless something changed in Ventura. I can also try to transfer the SIT file directly, but I had trouble unstuffing it using StuffIt 4.0.1.

I don't think so, but I can send a list of extensions if you like. It's also possible the file is getting corrupted somehow in transferring to the Plus. I encoded the application using the binhex command in macOS Terminal so that I could transfer it to Mini vMac, which I then use to transfer...

I just tried launching v1.3.2 on my Mac Plus running System 7.0.1, however I get an "unimplemented trap error". :(

If you were able to find an angled SimmSaver/32, it might just work, but I can't make any guarantees!

Btw, if you look for SimmSavers specifically, the nomenclature is a little confusing: SimmSaver/30 - 4x30-to-30 SimmSaver/8 - 4x30-to-72 SimmSaver/8² - 8x30-to-72 SimmSaver/32 - 2x72-to-72

That's a big'un! Here's a photo of mine that holds them at a slant. Now, these are 30-pin SIMMs, and so wouldn't be suitable for an LC III, but they also made ones for 72-pin SIMMs as well. (These particular ones are "SimmSaver/30" modules, loaded with four 256k SIMMs each.)

There were a number of ram expander cards that let you re-use smaller ram simms in a single slot by combining them together. Check eBay, there were a number of them in various shapes and sizes, both branded and un-branded. Avoid MicroMac "SimmDoubler" cards, not because they're expensive on ebay...

Just discovered this company, Mountain Secure Systems, that produces a line of SATA-to-SCSI enclosures for legacy systems, the "Andes Series SCSI Interface to SATA Conversion". There is not any obvious way to purchase just a single unit, or even to see how much they are, so I doubt they'd be...

I have the soldering experience to be able to do something along the lines of JeffC's solution, but forgive my ignorance, is it not possible to simply remove the original processor and install a socket for the accelerator, or is it required as a sort of pass-through to the logic board? I do know...

Still hoping for a Plus version I can pop my 16MHz 68HC000 into. :)

Congratulations on a monumental achievement!

You're very welcome! Glad to help. :)

Whelp, unfortunately, the replacement crystal did not solve the problem. It exhibits the same symptoms as before (including the connected Drive 2.4 ejecting an inserted diskette on a cold boot). So I guess it's just fancy decoration unless someone happens to have a working Rapport to compare...

On a lark, I added additional solder to the main connector of the Rapport (it was very undersoldered in my opinion), but to no avail. Meanwhile, there's a crystal oscillator that should measure 16MHz, but with my meter on frequency mode I turned on the Plus with the naked Rapport connected and...

Experiment 2: When connected directly to the floppy port of the Mac (meaning, the Rapport is not used at all), the Drive 2.4 does not eject an inserted diskette at boot, seemingly indicating that it only receives power through the Rapport...

Well, a clue perhaps: With everything connected (Rapport & Drive 2.4), if a floppy happens to be inserted in the Drive 2.4, it will eject it when powering on the Mac for the first time, but not on subsequent restarts. The Rapport is still not being seen, but this indicates that: power is...

Do you mean the two wires coming off the side? That's just flux residue.

(Hence the name: Drive 2.4)

It has special proprietary formats for putting 1.2MB on 800k disks, and 2.4MB on 1.4MB disks. I have no plans to use them however.