MacOS 15 added the ability to see notifications from your iPhone on your Mac, which can be useful, but I found that it can also fill up your Mac's drive, even if you disable notifications on your Mac.
I have the Blink App installed on my iPhone. I also have it installed on my Mac, so notifications from my iPhone are disabled since any app installed on both the Mac and iPhone has notification from iPhone disabled. Push notifications for the Blink app include a camera image and I know from experience that the storage space used by the Blink App will grow over time because of this. On my Mac, I can just delete the images from the Library/Containers Blink folder. On my iPhone I have to log out and back in from time to time.
Today I noticed a large amount of disk space being used in ~/Library/Group Containers/group.com.apple.UserNotifications/Library/UserNotifications/Remote/default folder on my Mac. I found one folder contained several GB of attachments which turned out to be every image my Blink camera pushed to my iPhone since I installed MacOS 15 and iOS 18 back in September. I found that even though notifications were disabled for Blink on the Mac side, they were still enabled to be “Show on Mac” in the iPhone Notification Settings. As such they were being sent to my Mac, even though they were never displayed. They just silently were added to that folder, taking up more and more disc space.
Apparently MacOS never deletes images in notifications sent from the phone, so if you don't want your disk space to be filled up with useless notifications images from apps like Blink, Ring and Amazon (the 3 largest offenders I found on my Mac), you need to disable "Show on Mac" on the iPhone Notification settings.
I have the Blink App installed on my iPhone. I also have it installed on my Mac, so notifications from my iPhone are disabled since any app installed on both the Mac and iPhone has notification from iPhone disabled. Push notifications for the Blink app include a camera image and I know from experience that the storage space used by the Blink App will grow over time because of this. On my Mac, I can just delete the images from the Library/Containers Blink folder. On my iPhone I have to log out and back in from time to time.
Today I noticed a large amount of disk space being used in ~/Library/Group Containers/group.com.apple.UserNotifications/Library/UserNotifications/Remote/default folder on my Mac. I found one folder contained several GB of attachments which turned out to be every image my Blink camera pushed to my iPhone since I installed MacOS 15 and iOS 18 back in September. I found that even though notifications were disabled for Blink on the Mac side, they were still enabled to be “Show on Mac” in the iPhone Notification Settings. As such they were being sent to my Mac, even though they were never displayed. They just silently were added to that folder, taking up more and more disc space.
Apparently MacOS never deletes images in notifications sent from the phone, so if you don't want your disk space to be filled up with useless notifications images from apps like Blink, Ring and Amazon (the 3 largest offenders I found on my Mac), you need to disable "Show on Mac" on the iPhone Notification settings.
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