iCloud Photos Sync Paused — Photo Library Not Uploading or Downloading

Fix iCloud Photos sync paused or stuck where new photos are not uploading to iCloud or downloading to Mac from other Apple devices. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: iCloud Photos syncs your entire photo library across all Apple devices and icloud.com. Initial sync of a large library can take days or weeks depending on library size and internet speed. Sync pauses when on battery power (MacBooks) or when using a metered connection. The Photos app shows sync status at the bottom of the Library view. iCloud storage must have enough space for the entire photo library. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: MacBook on battery power — iCloud Photos pauses large uploads to save battery. iCloud storage full — no space to upload new photos. Photos app not running — sync only happens when Photos is open or in background. Network issue or iCloud service outage interrupting the sync. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Check sync status: open Photos > Library tab > scroll to the bottom for sync status message. Connect to power if on a MacBook (large syncs pause on battery). Check iCloud storage: System Settings > Apple ID > iCloud > verify available space. Keep Photos app open to allow sync to continue in the background. If stuck: System Settings > Apple ID > iCloud > Photos > toggle off, wait, toggle on to force re-sync. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Mac Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.