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A week ago, my mac pro 2012 was running Yosemite. At that point I made a backup of my phone, a 6s. currently running iOS 15.7.6

I then upgraded my mac it to High Sierra.

The night before, my phone updated to 15.7.6 from 15.7.5

Now, when I plug my phone in, this comes up:

update required

If I click Install I get this about 2 seconds later.

enter image description here

Repeating this on my wife's High Sierra machine, it downloads installs the patch, and her mac can link to my phone.

I can reproduce this problem with what should become my new phone a iPhone 11 Pro max running 16.5.1


From my reading the problem is a program called MobileDeviceUpdater

Console log, filtered for above

default 19:41:49.933933 -0600   MobileDeviceUpdater Got an error during the update?! Error Domain=SUSoftwareUpdateErrorDomain Code=106 "Can’t download the software because of a network problem."
UserInfo={NSLocalizedDescription=Can’t download the software because of a network problem., NSUnderlyingError=0x7f7fd5959a20 {Error Domain=NSURLErrorDomain Code=-1012 "(null)"
UserInfo={NSErrorFailingURLStringKey=https://swscan.apple.com/content/catalogs/others/index-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog, NSErrorFailingURLKey=https://swscan.apple.com/content/catalogs/others/index-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog, NSLocalizedRecoverySuggestion=Make sure you’re connected to the Internet, and then try again., SUErrorRelatedCode=SUErrorCodeScanCatalogNotFound}}}

I have a 48K crash log that makes no sense to me.

I have put a copy here:

https://drive.google.com/file/d/16gAFXDf_qBi7uUR3puu9ZM6xojTRWW8S/view?usp=sharing

Anyone who has the link can view.

I'm going to try a reinstall of High Sierra.

Edit in answer to comments:

Dan mac connection to internet

  • Ethernet cable to router.
  • Router through power injector to Fixed link LTE radio tranceiver mounted on a 60 foot mast. Relay to Telfordville tower, relay to Ponoka tower through several more towers. Fiber Optic to Alberta Supernet. VPN to ISP headquarters in Fredericton, New Brunswick.

Ptit Xav Connection to apple

General connection to Apple is fine. I can download 300 MB install files in a few minutes.

I don't think there is a firewall issue, as I have no problem doing this from another computer running High Sierra. I am currently using wifi instead of cable, as it's an easy way to change IP addresses. Same behaviour.

Programs like Transmission torrent downloader works fine.

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  • Can you go in Apple website from the Mac ? Have you configured a firewall ?
    – Ptit Xav
    Commented Jun 24, 2023 at 6:33
  • 1
    Don't reinstall High Sierra. This is a waste of time. Here is the useful error message: "Can’t download the software because of a network problem.". Check your network accessibility.
    – dan
    Commented Jun 24, 2023 at 7:42
  • Could you describe how your Mac pro is connected to the Internet?
    – dan
    Commented Jun 24, 2023 at 8:00
  • Someone only the other day had an issue relating to this - apple.stackexchange.com/questions/461301/… based on an older QA - apple.stackexchange.com/questions/327310/…
    – Tetsujin
    Commented Jun 24, 2023 at 8:46

1 Answer 1

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The answer can be found here: Mac OS 10.13.6 and newer mobile devices not working with iTunes 12.8.3.1 MobileDeviceUpdater.app not working

In short, you need to download Xcode.app from Apple (which may require registration of a developer account first), then find the MobileDevice.pkg file inside and open it, which should install the missing components.

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