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brinkeguthrie

macrumors 6502
Original poster
Updated MBA M3, iPad 11, iPhone 14. Synced iPad and iPhone to MBA, they synch fine but now show 'calculating' for hours. Is this the same as "indexing?"
 
You know you haven’t needed to plug in to sync for like 15 years now? WIFI probably be faster than the USB2 port on the iphone.
 
Um, what? I'm talking about synching music from MBA to iPhone and iPad. Both now say 'calculating....' for a long time. and I think it's due to system update.
 
Screenshot 2026-07-28 at 5.29.42 PM.png
 
I have found sometimes not having everything updated to the latest will present communication error. How big of a volume are you syncing ?
 
Well, I'm not sure. I mean, I have a 245GB MBA, and a 128 iPhone and iPad, is that what you mean? All devices are current builds.
 
Its part of it along with staging and storage management put your cursor over each color segment in the bar at the bottom and it will show the size the important one is at the far right next to documents and data will tell you how much free space you have . If you use more than 85% of 128 gb things will slow down at some point you will get a notice not enough free space. From the screenshot you posted it looks like you have maybe 10 gb left of free space before things get messy.
 
"Calculating…" in that storage bar means Finder is waiting for the device to return its media catalog, and two things usually stall it after an iOS update.

First — check Settings > Music on the iPhone/iPad for Sync Library. If that's on, cable music sync is effectively disabled and Finder will hang on "Calculating" because there's no valid catalog to fetch. You'll usually see a small note about it under the Music tab on the device page.

Second — the bridge daemon can get stuck. On the Mac in Terminal: killall AMPDeviceDiscoveryAgent && killall AMPLibraryAgent. They respawn on their own, and the next unplug/replug usually reads the catalog cleanly. Yanking the cable while it's mid-"Calculating" can leave that daemon wedged.
 
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