How to Remove Kindle DRM on macOS 10.15 Catalina?

As long as you have updated your macOS to the latest 10.15 version, you can never use 32bit application on Mac anymore and you are forced an update to 64bit app. Since Epubor Ultimate software can’t support the latest Kindle app, thus mac users feel very anxious about the fact that they can no longer remove Kindle DRM with Epubor Ultimate on Mac. Don’t panic, there are still 2 best alternative methods for you to decrypt Kindle books on Mac.
Method 1: Export Kindle books from Kindle Cloud Reader as mobi/azw3/ePub files with Epubor KCR Converter
Step 1: Run Google Chrome Browser. Then login to your Amazon Cloud Reader account and Enable Offline Reading.

Tips:
1. If you fail to enable offline reading after updating to the latest version of Google Chrome browser, please add Kindle Cloud Reader Chrome Extension to Chrome browser and you'll be able to Download & Pin Book.
2. Google Chrome is the only browser that can work with Epubor KCR Converter.

Step 2: Right click the Kindle book and select Download & Pin Book.

Step 3: Install and launch KCR Converter. All Kindle books downloaded via Kindle Cloud Reader will appear on the main interface of KCR Converter automatically.

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Tips: Whenever you download and pin any new Kindle book from Kindle Cloud Reader, you need to relaunch Epubor KCR Converter in order to upload all of your downloaded books to the main interface of KCR Converter, or the new downloaded Kindle books won't be detected.

Step 4: Select the books you want to convert, then choose EPUB/AZW3/Mobi as the output format and click on Convert button to start the conversion. Then the selected Kindle books will be converted to DRM-free Mobi/EPUB/AZW3 files soon. At the same time, the folder which stores the converted files will pop up immediately.

Method 2: If you have Kindle e-ink device, you can download & transfer Kindle books from Amazon website to your kindle device via USB, then use Epubor Ultimate to remove DRM. 

Step 1: Go to Amazon website, sign in your account and click Manage Your Content and Devices in the drop-down menu and find your Kindle books under Content column.

Step 2: Click the three dots icon to the left of the book title and select Download & transfer via USB. 

Step 3: Select your Kindle e-ink device in the pop-up window and click Download.

At the same time, this Kindle book will be downloaded to your Mac as well. 

Step 4: Use Epubor Ultimate to remove DRM.

First of all, go to Amazon website and find the Kindle serial number.

Second, run Epubor Ultimate, go to the user center >> settings >> Kindle >> input the Kindle serial number. 

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Third, drop & drag your downloaded Kindle books to the main interface of Epubor Ultimate in order to remove DRM.