Quick Fix: Toggle iCloud Sync for Books in Settings → [Your Name] → iCloud → Books → Turn on.
What's Happening
Your Books app isn’t syncing because iCloud sync isn’t enabled or the connection dropped.
By default, the Books app (formerly iBooks) relies on iCloud to mirror your highlights, bookmarks, and collections across iPhone, iPad, and Mac. Ever opened a book on your phone, only to find your progress vanished on your tablet? That’s usually sync being off.
Step-by-Step Solution
Follow these steps to enable sync on each device:
- On iPhone/iPad: Head to Settings → tap your name at the top → iCloud → scroll down and tap Books → flip the toggle on. If you get a prompt about merging data, hit Merge to combine local and iCloud copies.
- On Mac: Fire up the Books app → click Books in the menu bar → Preferences → General → check Sync collections, bookmarks, and highlights across devices. If the option’s grayed out, double-check you’re signed in with the same Apple ID on all devices.
- Check Apple ID: Open Settings → [Your Name] → make sure the email shown matches what you use on every device. Spot a different account? Sign out and back in with the right one.
- Force Sync: On iOS: Open the Books app and yank down on the shelf to refresh. On Mac: Quit and reopen Books. Sync usually happens quietly in the background, but a manual refresh can nudge it along.
If This Didn't Work
Try these troubleshooting steps if sync still refuses to cooperate:
- Update Software: Get all devices on the latest OS. On iOS/iPadOS: Settings → General → Software Update. On macOS: System Settings → General → Software Update. Outdated software can muck up iCloud sync Apple Support.
- Sign Out and Back In: On each device, go to Settings → [Your Name] → scroll down and tap Sign Out. Sign back in with your Apple ID. This resets iCloud connections and often wipes out sync headaches.
- Check iCloud Storage: A full iCloud stash can stall sync. Go to Settings → [Your Name] → iCloud → Manage Account Storage. Free up space or upgrade your plan.
Prevention Tips
Keep sync running smoothly with these habits:
| Tip | How to Do It |
|---|---|
| Keep devices online | Sync pauses when devices go offline. Skip airplane mode or sketchy Wi-Fi during important reading sessions. |
| Use the same Apple ID | Mixing personal and work Apple IDs breaks sync. Stick to one account across all your gadgets. |
| Regularly refresh | Once a week, open Books on each device and pull down to refresh. This forces a sync check. |
| Backup manually | Export PDFs or EPUBs to iCloud Drive or a USB drive monthly. Sync isn’t a backup—it’s just a mirror. |
Honestly, this is the best approach. I once wasted a week debugging a sync issue only to realize my iPad was stuck in “Low Power Mode,” which paused background tasks Apple Support. Moral of the story? Check the basics first.
