MobileRead Forums - View Single Post - Calibre 8.10 Book Viewer not displaying text

institute · 09-21-2025, 10:07 AM

Hi all,

The Calibre 8.10 Book Viewer is not displaying text properly. This is an issue with every book in the Library (all epubs). Instead I just see a wall of question marks each within a square. I have attached a screenshot. These books will display correctly in the Books.app using "Open with." I am on MacOS Sequoia 15.7 using a M2 Mac Mini. The Calibre library is stored on an external hard drive. Other files on that hard drive open properly in their respective applications. I have restarted the computer and reinstalled Calibre to no avail. Any ideas what the issue might be?

Thanks

09-21-2025, 10:07 AM	#1
institute Enthusiast Posts: 29 Karma: 68 Join Date: Apr 2013 Device: Kobo Libra 2, iPad	Calibre 8.10 Book Viewer not displaying text Hi all, The Calibre 8.10 Book Viewer is not displaying text properly. This is an issue with every book in the Library (all epubs). Instead I just see a wall of question marks each within a square. I have attached a screenshot. These books will display correctly in the Books.app using "Open with." I am on MacOS Sequoia 15.7 using a M2 Mac Mini. The Calibre library is stored on an external hard drive. Other files on that hard drive open properly in their respective applications. I have restarted the computer and reinstalled Calibre to no avail. Any ideas what the issue might be? Thanks Attached Thumbnails Last edited by institute; 09-21-2025 at 10:18 AM.