Creating this thread to track USB-Serial adapters and cables that can be used to make a serial connection between a Classic Mac and a modern machine.
In case you haven't seen it:
Reconnaissance: Modern Diagnostics for Your Classic Mac
StarTech.com 1-Port USB to RS232 DB9 Serial Adapter Cable - Prolific Chipset (ICUSB232SM3)
StarTech 4 Port USB to Serial RS232 Adapter - FTDI Chipset (ICUSB2324I)
6ft Apple Serial cable, MiniDin8 Male, 8 Conductor 10M3-04106
DB-9 (screw terminals)
4PCS DB9 Female Breakout Connector,DB9 Solderless RS232 D-SUB Serial to 9-pin Port Terminal Adapter Connector Breakout Board with Case Long Bolts Tail Pipe
DB-9 (solder type)
Oiyagai 10Pcs DB9 Female Connector Set, Solder Type, Plastic 9 Pins D-Sub Adapter with Hood for Serial Port
(Unverified) Apple IIGS Serial & Null Modem Cable for use with ADTPro
Unverified) Macintosh Plus Peripheral Adapter M0199 / 590-0553-A (available from various eBay sellers)
In case you haven't seen it:
Reconnaissance: Modern Diagnostics for Your Classic Mac
USB Serial Adapters
Both FTDI and Prolific chipset based adapters are known to work.StarTech.com 1-Port USB to RS232 DB9 Serial Adapter Cable - Prolific Chipset (ICUSB232SM3)
StarTech 4 Port USB to Serial RS232 Adapter - FTDI Chipset (ICUSB2324I)
Cable Parts
Mini-DIN-8 cables – I've successfully cut these serial cables and attached DB-9 connectors.6ft Apple Serial cable, MiniDin8 Male, 8 Conductor 10M3-04106
DB-9 (screw terminals)
4PCS DB9 Female Breakout Connector,DB9 Solderless RS232 D-SUB Serial to 9-pin Port Terminal Adapter Connector Breakout Board with Case Long Bolts Tail Pipe
DB-9 (solder type)
Oiyagai 10Pcs DB9 Female Connector Set, Solder Type, Plastic 9 Pins D-Sub Adapter with Hood for Serial Port
Pre-made Cable Options
(Unverified) 6ft DB9 Female to Mini DIN 8 Male Cable - Gray(Unverified) Apple IIGS Serial & Null Modem Cable for use with ADTPro
Unverified) Macintosh Plus Peripheral Adapter M0199 / 590-0553-A (available from various eBay sellers)