How to patch Kindle for Mac in 10.15 Catalina?
Updated : November 2nd, 2019
There is new way to download old kindle ebook format file in latest Kindle for Mac, v1.26, even latest version, so we can still remove drm in new MacOS 10.15 Catalina, we need do some patch on Kindle app to download old format files, this is step by step.
1. Install latest version of Kindle for Mac or update to latest version, v1.26,
2. Patch Kindle app in Terminal
run Terminal app,
copy and paste command follow command in terminal , you need to input password to execute command,
sudo chmod -x /Applications/Kindle.app/Contents/MacOS/renderer-test
if you don’t have password, then run this command
chmod -x /Applications/Kindle.app/Contents/MacOS/renderer-test
3. After patch kindle app, run Kindle app, download old ebook format file in special way.
you remove all priors downloaded books in download section in Kindle app. right-click ebook title in download section and select “Remove From Device” menu item to delete them.
download ebook in special way, right-click ebook title in “All” section, select “Download” menu item to download ebook in old format file, that is KEY thing.
4. Download and Run Kindle Converter, remove DRM and convert to pdf format
run Kindle converter, import Kindle ebook,
select book to convert, click “Convert” button, wait until finish.
Barnes Noble NOOK DRM ebook to PDF/HTML/Word/Text format
How to covnert NOOK DRM ebook to PDF format?
A. When you purchase ebook from bn.com, NOOK ebook file has DRM protection which NOT support by other ereader, that is ebook DRM limitation, you can’t read in any device, this is guide to convert drm NOOK ebook to pdf format.
ePub Converter is tools to convert Barnes & Noble NOOK DRM ebook to PDF/HTML/Word/Text format, it support both DRM and DRM free NOOK ebook, user can read purchased ebook in any device without limitation after ebook format conversion, it is eay use, support drag and drop, import NOOK ebooks from NOOK for PC automatically, convert DRM NOOK file to other format with 1-click.
1. Download and install NOOK app Nook for PC, download BN ebook in NOOK for PC.
Download ebook in NOOK for pc, click “download” button in NOOK for pc.
2. To convert B&N NOOK ePub files, you’ll need to install ePub Converter, click the Download link. once you’ve download ePub Converter, install it as normal.
Download for Windows 
Download for Mac
3.Run ePub converter after setup is complete, click “NOOK” button to import ebook into file list in converter,
select “PDF” in output format,
4. Click “Remove DRM” button, first times you need to input your Name of B&N account, and credit card number to decrypt drm protection, it is name in B&N account, not name on credit card, full digital number of credit card, this converter don’t keep these information, only to create a key file for next times.
5. if Name and number is correct, converter will remove drm protection and convert to pdf format, show it message,
you click “Open output folder” to find new drm free ebook file, now you can open your pdf file in any eReader program, share it to your friend.