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Doitsu · 12-06-2021, 06:27 AM

Since EPUBCheck is a Java app, you'll need to install Java. For more information, see Installing Java on macOS 11 Big Sur.

You could also give the Calibre epub checker a try, which'll also find some common epub problems.
Simply add your book to the Calibre library, right-click it, select Edit book and click Run check. (If the Check book window isn't shown, enable Check book in the View menu.)
If Calibre reports problems, click Try to correct all fixable errors automatically.

12-06-2021, 06:27 AM	#115
Doitsu Grand Sorcerer Posts: 5,748 Karma: 24032915 Join Date: Dec 2010 Device: Kindle PW2	Since EPUBCheck is a Java app, you'll need to install Java. For more information, see Installing Java on macOS 11 Big Sur. You could also give the Calibre epub checker a try, which'll also find some common epub problems. Simply add your book to the Calibre library, right-click it, select Edit book and click Run check. (If the Check book window isn't shown, enable Check book in the View menu.) If Calibre reports problems, click Try to correct all fixable errors automatically.