If you do want to add RS232 to either your Mac or PC at some point this is an example of the adapter I would recommend.
https://www.adafruit.com/product/18
It seems like it might come in handy for someone with a healthy collection of older machines.
I have dumped EPROM's from Sorcerers just by displaying the contents of memory but redirected out the serial port to my Mac laptop.
A little work in a column-oriented text editor to clean up the ASCII text file and some command line magic and you have a binary file.
Of course KERMIT, zmodem etc are more sophisticated ways to do it.
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