You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Mojave time machine back up failing

Since installing 10.14 have not been able to complete a full backup using time machine to external drive. All disks check out on disk utility first aid both under OS and stand alone utility under recovery. Have erased and reformatted the external drive. Still no success. Backup begins and runs up to about 80GB ok, then fails. Restart by "back up now" continues for about 500MB and then fails again. My full backup is about 900GB so I am running unprotected.

I believe this is a Mojave problem, not a drive problem.

Any ideas?

Mac mini, macOS Mojave (10.14), Samsung display

Posted on Sep 30, 2018 12:07 AM

Reply
330 replies

Dec 28, 2018 12:57 PM in response to Historyperson

Again, the Mac Extended Journaled Case-Sensitive or not Case Sensitive doesn't work for everybody.

Nice if it does for a lot of users though. For the remaining ones...


I do not have the Mac Cleanup folder on my machine.

I tried with an external disk as well as a dedicated partition on a NAS.

I tried to format APFS (TimeMachine reformats it automatically as it doesn't recognize that format), I tried Mac Extended Journaled Case-Sensitive, Mac Extended Journaled not Case-Sensitive, Journaled alone, encrypted or not, NTFS, FAT, exFAT

None of those do work. TimeMachine behaves normally until it reaches about 95% without a hitch and then starts growing forever until the drive is full.

I just gave up. This is totally amateur.

Dec 31, 2018 6:04 AM in response to namuang26

I am on an Macbook Air with 10.14.2 and the backup disc is an 1TB external USB disc with Mac OS Extended (Case-sensitive, Journaled).


As a next test, I removed the .inProgress file and disabled the Filesystem Protections with:

cmd-R Restore Mode

csrutil disable

csrutil enable --without fs


Now TM started all over again and is working on backing up 140GB. This amount seems okay for a full backup, BUT:

It is VERY SLOW !!!

It still calculates time remaining since more than three hours....

I expect this backup to take about 11 days!!


Not funny...


Dec 31, 2018 6:36 PM in response to sjordi

I thought all was well with my Case Sensitive drive. Completed multiple Time Machine backups up till today. Now it's locking up again when Time Machine attempts a back up.


I turned off Time Machine. I have at least one good TM backup, so I'll rely on my documents backing up to iCloud (not sure how much I should trust any of it right now).


As we enter 2019, it is amazing how Apple has become the case study of a "company in trouble" (plummeting stock, questionable product strategy, struggling sales, buggy software). Some of it is because Apple is an easy target, but this experience has made me question my confidence in the company as well.


What makes me feel worse about this is that my support case with Apple was dismissed as being Western Digital's problem. I think their view of these threads is that its a place for whiners to hang out and complain about their self-inflicted problems -- which may be a little true :) -- but they refuse to acknowledge that if there are multiple people reporting similar issues, maybe, just maybe, it's actually something that requires Apple to look into.

Jan 1, 2019 7:17 AM in response to speedolli

After I set Filesystem Protections: disabled

the backup was very slow, but after about 4 hours it suddenly speeded up.

The idea of "Filesystem Protections: disabled" did not change anything:

TM still came into the "endless growing" situation.

Now I see errors like this:

2018-12-31 18:22:51.067749+0100 localhost backupd-helper[104]: (TimeMachine) [com.apple.TimeMachine:TMLogError]

Failed to remove '/Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/Ollis MacBook Air/2018-12-30-083856/Macintosh HD/.MobileBackups.trash',

error: Error Domain=NSCocoaErrorDomain Code=642 "You can’t save the file “.MobileBackups.trash” because the volume “Macintosh HD@snap-97108” is read only."

UserInfo={NSFilePath=/Volumes/com.apple.TimeMachine.localsnapshots/Backups.backupdb/Ollis MacBook Air/2018-12-30-083856/Macintosh HD/.MobileBackups.trash, NSUserStringVariant=(


Jan 1, 2019 8:16 AM in response to speedolli

I switched back to

# csrutil status

System Integrity Protection status: enabled.


Then started a TM backup. Now I am back to this kind of error messages:


2019-01-01 16:32:13.564064+0100 localhost backupd[2174]: (TimeMachine) [com.apple.TimeMachine:TMLogError]

Failed to remove attribute 'com.apple.backupd.SnapshotVolumeLastFSEventID' from 'file:///',

error: Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"


Still the problem of "endless growth" persists.

:-(


I have no more ideas what to test and I am waiting for an Apple bug fix desperately.


Jan 2, 2019 9:21 AM in response to Michael Graubart

I wonder how many of the reports of TM/Mojave problems are caused by TM wrongly reporting times, dates and sizes of backups?


My computer is a Mac mini with MacOS 10.14.2 and my backup drive is a Samsung 1 TB one, partitioned into two equal 500 GB partitions, one of which I use with Time Machine. It is Mac OS Extended (Journaled) formatted.


I last backed my HD up onto this backup drive relatively recently and my usage of the computer has been routine and modest (emails, a couple of small document downloads, etc.), so 'Preparing Backup…' should not have lasted long. Yesterday afternoon at about 15:35 I initiated a new TM backup, but, to discourage hold-ups, I deleted the 'in progress' file from my backup drive and allowed Spotlight to do a complete indexing first.


'Preparing Backup…' lasted about 5 hours. From about 22:30, TM began to show 'Backing up'. At 23:20 the amount to be backed up was shown as '3:80 GB of 6.93 GB' and remained unchanged thereafter; the time till completion was shown as about 40 minutes, but gradually increased over the hours. After about 5 hours, I stopped TM and disconnected the backup drive.


This morning I reconnected the drive and examined what had been backed up. I obviously could not examine every file, but as far as I could tell everything had been completely backed up and was up to date. There appeared to be no way of reliably ascertaining the time of completion, but it was probably before 23:20 last night, relatively soon after the start of 'Backing up'.


I conclude that in my system TM does eventually do a complete backup to a drive formatted as Mac OS Extended (Journaled), that, however, it takes its time to start backing up after starting 'Preparing Backup…', and that it shows misleading information while backing up and even when backing up may already have been completed. Whether 3.80 GB or 6.93 GB or the difference, 3:13 GB, were not backed up I have not been able to ascertain, unfortunately.


I have updated my report in the Bug Reporter accordingly. I really think that that is the best place to report these problems and failures, because the Bug Reporter allows one — indeed, asks one — to attach a 'sysdiagnose' file containing a wealth of information about the inner workings of TM, generated while TM is working, by means of a Terminal code or a combination of key-strokes. I know that the Apple engineers read these reports, because when I first submitted a bug report about TM but failed to generate and attach a sysdiagnose file, the engineers replied within the Bug Reporter, asking me to repair my omission.



Jan 5, 2019 1:27 AM in response to Michael Graubart

I get an "account not found" error when I attempt to log in to the Bug Reporter with my Apple ID (same one I use here). On the Bug Reporter page, it mentions signing in with a developer account, so I'm guessing that's why I can't sign in.


Apple Bug Reporter is a web-based tool that developers can use to report issues with Apple software and services, request enhancements to APIs and tools, and track the status of their feedback. To access Apple Bug Reporter, sign in with the Apple ID associated with your developer account.


In any case, hopefully those who have reported it via the Bug Reporter will get more traction with the defects with Time Machine.

Jan 6, 2019 3:32 AM in response to Michael Graubart

You definitely need an Apple Developer plan to report the bug.

It checks this beforehand and offers to subscribe. If you have a developper plan, then you can go further and post.

You also need to include a sys diagnostic zip file that takes about 10 minutes to be generated, otherwise, you can't post.

I just went through the entire process and used my developper account, not my personal one.

And submitted the details and tests, all hard disks tried (HP, Toshiba, Samsung, Seagate,WesternDigital), all of them formatted with each and every available format. I did actually attempt about 60 backups. All formats, all disks, all failed and grew forever until the disks were full.

We'll see whether we have an answer.

Jan 6, 2019 7:40 AM in response to sjordi

You may require (or have required) a Developer Account, sjordi. I did not require a Developer Account, I have not got a Developer Account, I do not need a Developer Account, I am not a Developer and I do not intend to get a Developer Account.


As for having to produce and submit a sysdiagnose file, I mentioned this earlier in this string. I at first failed to do so, and the Apple people replied, both in the Bug Reporter and by email, asking for one (proving that they do read these bug reports), which I then did create and submit, twice over, at two stages during the very lengthy TM backup process.

Mojave time machine back up failing

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.