Calibre preview showing weird fonts all of a sudden

somefire · 12-20-2025, 06:44 PM

I've used Calibre for something like ten years, and never experienced this before. If anyone can help me, and explain it simply, I would appreciate it!

I saw something saying I need to go into font settings, but I never mess around in there when I sideload content, and I don't see those settings now.

This happebs when I preview any book in Calibre now with the update. I've even tried installing a prior version to see if that would fix things, but no dice. These same books looked just fine days ago, before the update.

I’m on the latest Mac OS, all updates installed, and was on the latest Calibre.

Thanks!

BetterRed · 12-20-2025, 08:26 PM

See if this thread helps ==>> No characters are displaying in Calibre Viewer / Editor

BR

somefire · 12-20-2025, 08:37 PM

Quote:

Originally Posted by BetterRed

See if this thread helps ==>> No characters are displaying in Calibre Viewer / Editor

BR

Thank you!

I tried searching for so many terms on here for help, but this never showed up (different search terms).

Resetting the Mac Font Book did the trick. Crazy how one thing spirals and affects another and another...

Thanks for saving my night mate.

JSWolf · 12-22-2025, 06:51 PM

Seems fonts can be an issue with MacOS.

12-20-2025, 06:44 PM	#1
somefire Junior Member Posts: 3 Karma: 10 Join Date: Oct 2021 Device: Kobo Libra 2	Calibre preview showing weird fonts all of a sudden I've used Calibre for something like ten years, and never experienced this before. If anyone can help me, and explain it simply, I would appreciate it! I saw something saying I need to go into font settings, but I never mess around in there when I sideload content, and I don't see those settings now. This happebs when I preview any book in Calibre now with the update. I've even tried installing a prior version to see if that would fix things, but no dice. These same books looked just fine days ago, before the update. I’m on the latest Mac OS, all updates installed, and was on the latest Calibre. Thanks!

12-20-2025, 08:26 PM	#2
BetterRed null operator (he/him) Posts: 22,092 Karma: 30277960 Join Date: Mar 2012 Location: Sydney Australia Device: none	See if this thread helps ==>> No characters are displaying in Calibre Viewer / Editor BR Last edited by BetterRed; 12-20-2025 at 08:29 PM.

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12-22-2025, 06:51 PM	#4
JSWolf Resident Curmudgeon Posts: 81,315 Karma: 150263711 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Seems fonts can be an issue with MacOS.

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