Comment by occz
10 hours ago
>Unfortunately on MacOS it seems you have to use Amazon's app to access the filesystem.
I can recommend using a Filebrowser plugin for KOReader, that way you can access the file system over a web interface and upload that way. No cables needed or anything, quite convenient.
The latest generation paperwhite (“PW6”) and color readers use MTP rather than acting as mass storage devices.
I use OpenMTP rather than Amazon’s software, and that works fine for me.