I am curious which Kindle app you are using on your Mac, the old Kindle Classic app or the new Kindle for Mac app?
And why AZW3 format? The Kindle apps on Apple devices do not support that format natively.
I suggest you try using Amazon’s send-to-kindle with an EPUB source file. That should result in your book being delivered to Kindle apps and devices in Amazon’s newer KFX format.
|