Questions tagged [data-synchronization]

The process of getting the same data on different devices and copying changes from the device you make the change on onto all the others

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Why is a subfolder created when syncing a second Mac's Documents folder via iCloud?

I got a MacBook first and synced Documents and Desktop to iCloud. Then I got a Mac Mini and also enabled syncing. Now with the Desktop it works as expected: Same files on both Desktops. But in ...
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Is there any way to whitelist my apps from reinstalling when logging on a new device?

I've been using my Apple ID for years and downloaded a lot of apps. When I logged in on a new device, my apps would automatically download. It's even weird that only a few recently purchased apps were ...
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When “Automatically sync when this iPhone is connected” is enabled, when does sync happen?

I can trigger sync on macOS in Finder, but how often does it sync? Can I trigger a sync using command line or on iPhone? Thanks for helping out.
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Syncing messages across iPhone and MacBook (specific situation not covered in most tutorials)

I had to restore my iPhone and reinstall macOS on my MacBook a couple of days ago. Each operation was done separately. The result of performing them is that the messages I exchanged while my phone was ...
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iTunes not syncing complete playlists to iPod classic

I have 1015 songs in the My Top Rated playlist on iTunes on my Mac. Only 568 will sync to my iPod classic. I have checked that all the songs are 5 star rated and made sure that the "rules" ...
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iPhone wont sync to iMac

Does anyone know why whenever I connect my iPhone XR to my iMac to try to sync new music & playlists from my music library, I get a message saying 'iPhone cannot be synced because the iPhone could ...
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Auto sync iPhone video with MacBook

I take videos with my iPhone and I would like them to be automatically transferred to my MacBook without using iCloud. The use case is that I take large videos, filming for 15 min to hours and I want ...
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What are "live update" and "select random" supposed to do in Music playlists?

I had a playlist of over four thousand songs, four days worth. It was too big to sync to our iPad. So I duplicated it, and changed the rules to limit to twelve hours, selected randomly. Live update ...
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AppleID reports storage smaller than the size of the Photos Library on the Mac

Several days ago, after posting this question, I surrendered to Apple and ticked the box to synch Photos between my iMac (macOS 12.2.1, 1TB SSD, not Fusion) and my iPhone and MacBook Air via iCloud. &...
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Synchronize preferences between macs?

I use four different Macs on a daily basis. I would love to be able to synchronize preferences between them. This is an obvious feature that is missing from iCloud. I'm thinking of writing software to ...
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Merge Chrome history and download history

I accidentally deleted my Chrome data folder, but was able to sign in using my Google account and restore my tabs, bookmarks, etc. But I forget that I have backups, and now I'm left with old data and ...
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Lots and lots of email suddenly deleted – known iOS Mail sync bug?

Yesterday, my wife's gmail and fastmail accounts suddenly showed many fewer email. She noticed this first on her phone – the most recent messages were from October 18, 2021 (almost three months ago). ...
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Best way to sync large iPhone video files to MacBook when on the road?

I have an iPhone 12 Pro and plan on traveling and editing the iPhone videos I make on a laptop. At the moment I am undecided if it makes sense to get a Apple laptop, or a regular windows laptop for ...
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How does Google Drive locally cache files before uploading them? How safe is it when offline?

I've been using Google Drive to backup via Time Machine on a macOS 10.13.6. More precisely, I've created a sparse bundle disk image, attached such image and mounted it in order to make it visible to ...
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Setting up 2 MacOS partitions to use and back up the same shared Document partition

my question is similar to another question, but I need a different aspect of it that is not asked and answered there. So I would like to access and backup my Documents folder from different MacOS ...
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Does Safari 15.1 (15.1 on macOS and iOS 15.1) fix losing tabs opened in groups?

I had problems in Safari 15 (not 15.1) with tabs disappearing. Few times iPhone have different tabs opened in some groups and when it synced this group with Mac it basically overwritten what tabs I ...
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Can't delete app data on iOS, appears after reinstall

I've got an app installed on my phone (its name is unrelated for now). The accounts I'm logged in within the app are displayed on the first screen of the app. For some reason this data is still there ...
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How do I get iCloud Drive to sync again when folders suddenly get duplicated?

I've got iCloud Drive on a computer that runs Windows 10. In the beginning all folders from iCloud.com synced to the local iCloud Drive folder. Then, at some point some of the files and folders ...
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Is it possible to sync an iPad 9 to a Windows PC without ever connecting it via cable

I have a new iPad 9, which seems to work ok and was supplied with a usbc to lighting cable. I also have a ThinkPad t470s which has 1 USBC port. Lenovo sold millions of laptops with dubious USBC ports, ...
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iPad (air 2) not showing up on Finder

I got an iPad air 2 that does not show up on Finder (running latest iOS 15.0.2) when connected with a lightning cable. I want to sync some files/photos to it and can't. I do see it just fine in Image ...
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Syncing messages, calendar via iCloud between restored iPhone to one migrated using Move to iOS

For many years I used iPhone, but then tried to use Android. I'm now back on an iPhone. On the new iPhone I restored it with the last backup from my old iPhone. All is good. I used "Move to iOS&...
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I am syncing my MacBook Pro OS 11.6 with my iPad 15.0.2. Music completes, but then it states "Reading Photos Library"

It has now been reading the photo library for 5 full days. I have only just 7,000 photos on the Mac. I have no photos on the iPad, because I deliberately cleaned up the iPad in the hope that after ...
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iTunes Photos sync tab eternally spinning wheel

iTunes 12.9.5.5 on Mac Pro Mojave 10.14.7 There will be a 500 point bounty awarded for any useful answers on this question. I will award retrospectively, as otherwise it will timeout in a week. Note: ...
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sync documents between Mac

I have this scenario: 2 Mac, I work on both of them online and offline. I would like to have selected folders always in sync and the copy on each machine. So, If I work from home on Mac 1 and update ...
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Preserve Apple Watch fitness data when resetting and syncing to a new iPhone

I just got a new iPhone and I have an existing watch. There were some pairing problems, so I was prepared to erase my Apple Watch and do the pairing again - no problem - I’ve done it before. The only ...
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iMac does not recognize iOS devices ("AppleUSBHostPort::disconnect: persistent enumeration failures")

An old (mid-2010) iMac 27" with MacOS 10.11.6 behaves quite normally otherwise, but ignores iOS devices (tried with iPhone 12, iPhone SE1 and iPad mini 2): They do not show up in the system ...
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How to connect Ios15 device to macos Catalina after a failed software update

Last night i tried to connect my Iphone 13 pro(running iOS 15.0.0), to my macbook pro running MacOS Catalina(10.15.7). Realized I needed to do a update in order to connect the 2 devices. When the ...
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Q: How to configure Contacts.app with Google Contacts so that labels show up as contact groups?

I'm trying to get the Contacts app on MacOS Big Sur to display my Google contacts correctly. I have the account configured and the contacts themselves show up, but the Google contact tags (what Google ...
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Sync says iPhone cannot play .m4a

I have about four thousand audio files in Music. They are all either mp3 or .m4a, roughly half of each. Occasionally, I remove all from the iPhone for two reasons: I need the space to do an update ...
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Done downloading iMessages from iCloud but recent ones are missing

I opened Messages on my MacBook Pro and clicked "Enable Messages in iCloud". It said "downloading" (or something along those lines) for a good 10-15 minutes and then stopped, ...
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Replacement for Apple Music on macOS?

I've noticed that Apple no longer requires the Music app (previously known as iTunes) to be running in order to sync your music library on you mac with an iPhone or an iPad. This is fantastic because ...
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iCloud refusing to sync

I am currently struggling to get my MacBook Pro to sync my Documents & Data. Here's what I tried: Completely wiping my MacBook Removing the CloudDocs folder Restarting my Mac many times Changing ...
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Google Drive macOS client can't dowload files inside mounted dmg virtual drive

I'm trying to let Google Drive client to sync files inside mounted dmg. I've added the folder (mounted dmg) to Google Drive client for backup. Everything works fine: upload of new files from my ...
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Duplicate albums are appearing in Apple Music on iOS after editing metadata of purchases

I manually manage my music library on my Mac outside of Apple Music, and sync it with my iPhone. Unfortunately, as I have edited the metadata of past iTunes purchases, Apple Music on iOS is showing ...
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How do I get Apple Photos to sync on macOS?

I'm aware that Apple Photos syncs in the background according to it's own rules, but Apple Photos on macOS hasn't synced (according to the status at the bottom of my library) for almost 20 hours, ...
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How do I get HR data on my Watch to my iPhone?

I have HR data that I can see on my Watch, but on my iPhone there is a gap where a chunk of that data is missing (both in the Health app and in all linked apps that get HR data from HealthKit). How do ...
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sync iPad home screens between 2 iPads

Is there a way to sync (even one time or better yet keep in sync) the home screen and applications between 2 separate ipads (11" and 13" pro latest gen) so that they will have the same ...
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Is it possible to sync Safari tabs between two Macs and have the tabs layout identical between each machine?

Is it possible to sync Safari tabs between two Macs and have the tabs layout identical between each machines? I know you can have something that shoes the tabs open on an iPhone or iPad like: But ...
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How do I get Contacts to sync?

Often, after making changes to an address in Contacts on my MacBook those changes fail to appear in Contacts on my iPhone or in iCloud. Like many things having to do with syncing and Apple, there's no ...
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Some photos are sharp on the phone but low-res on icloud.com/photos

My wife has an iPhone7 with "Optimize iPhone Storage" enabled, and an iCloud account with more than enough storage -- 77GByte of photos and 200GByte storage on iCloud. She's gotten to be ...
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How to prompt Safari 14.1 bookmark changes?

Two Macs are both running updated Catalina. Safari bookmarks that are added to one machine are automagically updated on the other, because of the same AppleID. Bookmarks were organized into folders ...
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Synching music from macbook to iPhone randomly picks album art instead of using the correct album art

I've never encountered this problem before. I have several recordings that I made of chamber music groups I'm in and of my playing, which I wanted to transfer onto a new iPhone (iPhone 12, iOS 14.4.2) ...
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2 votes
2 answers
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Finding which files the migration assistant failed to transfer

I ran a transfer of about 4 TB of files from my failing Mac to my new Mac. After 62 hours of direct connection transfer time (which seems inexplicable), I was told at the very end of the process that ...
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How do I prevent truncation of my Mac browser history and sync history between devices?

Recently something strange happened with my Safari browsing history. Suddenly one morning com.Apple.Safari.History started burning CPU and a zero-byte ClearHistoryInProgress file appeared in ~/Library/...
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Is Notes sync broken on iOS 14 and macOS Mojave 10.14?

I remember that I read somewhere that notes in iOS 14 will not be compatible with notes in Mojave. But I cannot find any more updated information. Some claim that they only stop working after one ...
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Contacts and calendars only sync from iPhone to Mac, not Mac to iPhone

When my friend syncs their iPhone over USB with their Mac, contacts and calendar entries they create on their Mac are not copied to their iPhone, but contacts and calendar entries they create on their ...
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MacBook M1 Big Sur crashes every time when I open "About This Mac -> Storage -> Manage"

Background: I'm using a MacBook Pro with M1 chip and Big Sur V11.1 (got it last month). One thing really annoys me is that when I connect my iphone, sync starts automatically and it takes up 20GB to ...
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Subscribed calendars not shown on my device, but they can be opened manually [iOS 14.4.2]

I am trying to write a PHP service to make calendars from some data. Anyway, the example it returns (it is static during the test) shows up normally when trying to get it by http://my_domain.com/ics....
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Where is photos.sqlite-shm

I am trying to sync my Mac (macOS 11.2.3) "Pictures" folder with my NAS using Synology Drive. I receive an error message stating that photos.sqlite-shm cannot be synced due to missing access ...
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Where does Google Drive File Stream store offline files and folders on a Mac?

I use Google Drive File Stream for work, and there are certain mission-critical files that I need available for offline access. File Stream makes this easy: control-click on the file, and choose &...
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