[odamizu]

Originally Posted by jhowell

I updated the first post in this thread to link to the new information by odamizu for getting Method 2 working with the latest Kindle for Mac.

Thank you, jhowell

• The key to getting KF8 from K4Mac 1.25 thru 1.31 is to block KFX with chmod -x (Method 2), then download books using right-click on mouse and selecting "Download", or use menu bar "File > Download". Do NOT open the book. If you open the book, you end up with .kcr, in which case remove it and re-download per above without opening it.
  
  
• IMPORTANT: chmod -x does NOT work on K4Mac 1.32 or 1.33 (more info). To block auto-updates, see this post. Also, there is an isolated report on GitHub (#1943) that chmod -x is not necessary on M1 Macs (more info).

Notes:

• If chmod -x (Method 2) doesn't work, try: sudo chmod -x. Also, make sure the Kindle for Mac app is in your Applications folder. If you put it somewhere else, you'll need to modify the filepath accordingly.
  
  
• Catalina, Big Sur and Monterey require K4Mac 1.25 or newer.
  
  
• If Calibre 5.x isn't working, be sure to use tools v10.0.2 or newer.
  
  
• Applying chmod -x to 1.25+ will cause K4Mac to crash every time you close the app.
  
  
• Applying chmod -x to 1.30 & 1.31 will cause K4Mac to crash if you try to open and read a book (as opposed to just downloading it).
  
  
• Applying chmod -x to 1.32+ will fail. Go back to 1.31 or earlier. However, if you're on an M1 Mac, you may not need chmod -x to get KF8 (more info).