M1 Mac synced with iPhone/iPad

A fresh install of iOS probably won't help. I've already tried a "Restore iPhone..." on the M1 MBP to completely wipe my iPhone 12 and reinstall iOS 14.3 from scratch (and also an iPhone 6 to reinstall iOS 12.5). It didn't help. The phone works fine after the reinstall until you "Trust" the MBP and do another Sync, then the problem happens again.

I've been back and forth with Apple Engineering a few times trying to provide them more information. The latest update from me is I provided engineering with before and after logs from one of my iOS devices and my MBP while recreating the issue, along with screen recordings of both the iPhone and the MBP at the time so they have the exact timestamps when the apps on the iPhone stopped working. Currently waiting to hear back if they find anything.

Hey CodeMonkey Zimbu.

I am so glad I saw your post. This same thing happened with me. I have the M1 MacBook Air and tried to sync a new iPad Pro to it. Same exact issue you reported having I had. We thought it was the iPad Pro and was about to get it sent back to get a new one. We restored many times and kept checking what the common denominator is and its only when we sync to the MacBook. We also have an iPhone 12 mini which we have not synced to the MacBook and works perfectly fine

There are several threads on this problem. This seems to be the latest, but I have one observation to make that I have not seen elsewhere which leads me to think that the trust permission allows the M1 Mac to do something unfortunate with the App store on the iPhone, rather than the apps themselves.

I noticed when my M1 MB Pro (11.1) and an iPhone XS (14.3) went through the trust process for the first time when I was syncing music, the App store stopped working properly. The offered updates to some apps commenced, seemed to complete then was reset as available. This was stuck in a cycle. Those apps that had finished updating would not launch. Apps which had not been updated continued to work normally.

This only happened after permission was granted for the phone and M1 Mac to trust each other. Prior to that moment the App store on the phone was working perfectly, happily offering and completing updates to apps that were perfectly well behaved after being updated.

My conclusion was that the M1 Mac was interfering with the App store app on the iPhone which in turn was corrupting the apps it was working with.

I erased and restored the phone from an iCloud backup and added the music content from the Music library which I had copied over to an Intel Mac to sync it to the iPhone. The XS had no contact with the M1 Mac. When all this was completed the phone was working perfectly again; the apps which had failed to launch were launching and usable.

Other posters have commented that Apple is working on this problem but for now the XS isn't going near the M1 Mac.

Have the sam issue with iPhone 6s and MBP M1 - after connecting via usb-c to lightning all non-apple apps stop working. Found out, that a reinstall/backup on my old MBP (2012, latest Catalina) helped to fix the iPhone. Even a simple sync helped the last time.

got a appointment in Wednesday for a call with apple - maybe they now how to deal with it

WORKAROUND! for this issue: On Accident I connected iPhone and MBP M1 via WLAN and synced.... Apps stoped working immediatly. Then connected to my old MBP (2012, latest Calatina) and synced. Apps are all working again.

This will help you to not do a backup or reinstall of your iPhone.

sorry for my bad english

I'm having exactly the same issue.

iPhone X started experiencing this issue in December, put it down to a recent iOS update and contacted Apple Support.

Work allowed me to use one of their iPhone 12s this week so I can use apps again and was working flawlessly until I synced it to my M1 MacBook.

Looking at the timeline and the other comments, it wasn't an iOS update - it was the same day I got moved all my files to my M1 Mac and synced it for the first time!

I'm waiting an update from Apple Support tomorrow but I'll mention this thread and see if there are any updates from them on it.

I'm having the same issue. non apple apps crash as soon as I sync iPhone X to m1 MacBook Pro but they work fine if I sync to windows 10 laptop. I have tried everything at this point so I won't be syncing until this is resolved.

If you're unable to restore your device using iCloud, you can still sign into iCloud and the App Store to see your previously purchased apps. Simply redownload those from the purchased history in the App Store. There is no need for a manual sync.

Same for movies purchased through Apple, those sync automatically to your Apple TV App Library where you can redownload those. Do not sync manually from your Mac.

Same for books/PDFs. You can sync these via iCloud Drive from your Mac Finder to any other device using the same Apple ID. They would sync to the Files app on iOS devices. Do not sync manually from your Mac.

I have a large music library of artists not available on Apple Music / Spotify I have ripped from physical media I own and there is no way for me to get these onto my device other then manually sync. The issue is simply stopping you being able to use your device in the intended way if you don't use a streaming service.

iCloud syncing works for the majority of use cases, but there are still cases where you need to sync with the Mac.

If you don't have an Apple Music subscription, there is no convenient way to get your iTunes library onto your device without syncing.

If you're a developer, you need to be able to connect to your Mac to get your apps on your device for debugging.

If you don't have a large iCloud Storage subscription, you may want to sync to get your photos off your iPhone and onto your Mac. Same for taking backups of your device.

iCloud is a great workaround, but it doesn't fully solve the problem.

I like the Dido song "Life for rent"! Listen to it for the content. I Like to own the music and media the music is on! I don't stream music. Apple Microsoft, spotify, Pandora.Amazon and many others want to force you to stream from them at a charge of course. I buy Music CDs and transfer to FLAC (Free Lossless Audio Codec.). It is a lossless Media, Much better than mp3 which looses some fidelity. When you rent an apartment you are loosing money when compared to buying a Condo or Co-op apt. The cloud is similar also. The cloud flourished just as Hard drives became cheap. Store the music you buy on Hard drives, SSDs or USB sticks or your phone with Carplay or your cars infotainment system.

I just created a brand new Apple ID just to test it and it works after I sync. as soon as I try my old Apple ID third party apps crash again. unfortunately I have all my iMessages, contacts, photos and purchases on my old Apple ID....

I was wondering if it might be something with our Apple ID's. Others have reported that everything works without issue using the same software and devices. I did try syncing with a new account on the Mac that was not logged in to an Apple ID, but the phone was logged in on my Apple ID, and the Mac was logged in as well but on another local account...

I'll see if I can test this on my devices. I'll also mention it to my advisor when I have my next call.

I can confirm, that 14.4. doesn't solve this issue.

Additionally I found out, that my M1 isn't listed on iCloud.com as one of my devices. But on appleid.com all devices are listed. Can anyone confirm this on his account?

Have not yet tried 14.4 (waiting for Big Sur 11.2 as support suggested). I can confirm that I'm seeing the same regarding the devices though. All my devices are listed correctly on appleid.apple.com, but my M1 Mac is not listed on iCloud.com under "Account Settings".

As I mentioned above, I did create a second Apple ID which is working. If I look on iCloud.com under that ID, the M1 Mac is showing up. So perhaps that is part of the cause?