FLAC On A Mac

I've taken my flash drive from my wife's PC to my Mac and there weren't any compatibility problems. I don't know how it was formatted though. It came formatted from Lexar.

I downloaded Decibel, the trial version, and it worked fine with the FLAC files I downloaded from hdtracks. (Unlike the DVD-As I burned from those same files, but that's another story.)
I'm wondering if you downloaded 24-bit/192kHz files... The Marantz can only play back up to 24/96.

I agree, the file should remain a FLAC file when you transfer it from your Mac to a thumbdrive. So I don't understand why the Marantz won't play it.
You know, this is likely unrelated, but I just copied my hi rez Rush and Milos Karagdelic FLAC files from my Mac to a flash drive. I also copied some Apple Lossless files to the flash drive. I wanted to see if my car could play the FLAC files, as it has a USB port. It turned out it could not. I wasn't really expecting it to. It occurred to me later though that the FLAC files may not be to blame, as I have literally thousands of Kindle book files on the same thumb drive, so maybe the car stereo got overwhelmed looking for audio files. SO, maybe we should both make sure there's not a lot of extraneous junk on our thumbdrives? I don't expect the Camaro to play the FLAC, esp hi-rez FLAC, but I do expect the Marantz to, of course.

I deleted all the eBooks and the car stereo still crashed when it atempted to read the thumb drive. Oh, well.
I can't think of anything else to get the Marantz to play the files, so I guess you should wash your hands of it and try another device.

Cool, I look forward to hearing about the freshened Marantz.

So how is the Marantz after all?