export edited raw files from a macbook pro to an SD card

Yes, I want to keep them in the original RAW format. I want to be able to further edit them on a Windows machine. I edited the date on the Apple machine because one of my cameras went back 3 years. The Windows machine can't edit dates properly, but my Photoshop program is on that machine. The Apple machine can edit dates (I think). I won't actually know if the edit "stuck" until I can get the photos back onto the Windows machine, via an SD card. I tried transferring them via sharing between the computers, but that would have taken days- the Apple machine is quite old. I will buy a new (refurbished) Apple machine just for this purpose if this works. I am losing hope that it will work, though. My research shows that Apple will only allow the exporting of its proprietary RAW format, which of course my Nikon does not create.

I forgot to mention that the only formats permitted in the export option are JPG, TIFF, and PNG. None of those works for me.