Just reporting in about success with Kindle 1.26.1, Big Sur, DeDRM 6 & Calibre 4.23, basically using Method 2. I purchased a new MacBook Pro (mid-2020) last week which came with Catalina and then I installed Big Sur. I first tried with Calibre 5+ and the new DeDRM 7+k plugin and could not get the combo to DeDRM. So went back to Calibre 4.23 & DeDRM 6 and voila, worked. I applied chmod -x too. I also tried Method 3 with an e-ink...could not get it to work...no .azw downloaded...not sure what it going on.
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