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Questions tagged [apfs]

A filesystem developed by Apple Inc first introduced in macOS Sierra 10.12 Developer Release and for public use in macOS High Sierra 10.13.

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2 answers
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Is it possible to manually TRIM the unused blocks (free space) for an existing APFS volume?

When migrating a MacBook from HDD to SSD, I did a block-level copy using dd. I believe for optimal flash lifetime and performance, it would be the best to issue a TRIM for every unused block in the ...
比尔盖子's user avatar
1 vote
0 answers
3k views

Cannot login or unlock FileVault encrypted volume after a Big Sur update gone wrong

I am facing a little nightmare here after trying to update a FileVault-encrypted two-port 2017 Macbook Pro from Mojave to Big Sur. During the update the following error ocurred: An error occurred ...
phil's user avatar
  • 11
2 votes
1 answer
1k views

Messed Up APFS/Bootcamp Partition Table

I messed up my partition table after trying to get Windows 7 Boot Camp installation bootable after being unbootable using option/alt on start up. Back Story At some point a few months ago, I had ...
technogeek1995's user avatar
0 votes
1 answer
1k views

Is it possible to add the noatime mount option to /System/Volumes/Data?

I run a server farm of Mac minis. For performance and SSD-longevity reasons, I have (≤ Mojave) partitioned the SSD in APFS and mounted the new partition with the noatime option, and confine builds to ...
SGDave's user avatar
  • 53
22 votes
9 answers
11k views

Limit Time Machine size in Big Sur

In setting up a new Time Machine, how can I limit how much disk space Time Machine has access to? I am only interested in answers relevant to Big Sur's change to AFPS for Time Machine. Before 10.13, ...
Unrelated's user avatar
  • 555
0 votes
0 answers
275 views

Unable to format internal disk: disk is read-only

I'm having a strange issue with my MacBook Pro (13" early 2015 running macOS Catalina 10.15.7): few days ago I was using my computer when it has suddenly shut down, when i powered it back on and ...
RyanJ's user avatar
  • 11
0 votes
0 answers
127 views

Time Machine errors "deleting backup" on NAS

I was wondering if anyone had seen errors like the following. I’m on Big Sur 11.1, Time Machine to a Synology NAS which was started after the upgrade (so it should definitely be APFS). I’ve been ...
Andrew Jaffe's user avatar
2 votes
1 answer
227 views

Is it possible to configure Finder to report hard-links size only once?

I've created multiple hard-links to a file in a folder to illustrate the issue. ~/Test $ ln original.pdf link1.pdf ~/Test $ ln original.pdf link2.pdf ~/Test $ ls -li 403963 .rw-r--r--@ 3 80k username ...
acorello's user avatar
  • 153
5 votes
2 answers
9k views

How to Format APFS drive using a PC so I can replace my Mac drive?

I have an older iMac (Late 2012, A1418) that has a defective hard drive. I need to replace the drive and put in a fresh OS (Catalina). I have the install media on a USB flash drive. My problem is that ...
JCS's user avatar
  • 51
0 votes
1 answer
242 views

tmutil doesn't create a real snapshot (since Catalina?)

I'm using rsync on top of a mount_apfs snapshots, to backup a consistent file system view and without having to stop applications during the backup. After having investigated the rsync error 'file has ...
zakmck's user avatar
  • 394
1 vote
1 answer
89 views

Some files disappear from an APFS snapshot

I'm using rsync on top of a mount_apfs snapshots, to backup a consistent file system view and without having to stop applications during the backup. While so far, it has been working pretty well, from ...
zakmck's user avatar
  • 394
-1 votes
1 answer
3k views

Resize APFS partition in Big Sur

Like many people online, I've been having issues with resizing my APFS Partition ever since Big Sur (11.1 BETA). There was a point in time where I had 500GB of unusable free space that I couldn't ...
Antony Basta's user avatar
10 votes
4 answers
5k views

Is it possible to limit the size of an APFS volume?

My understanding is that with APFS, volumes exist inside containers, and the volumes all grow as much as needed, as long as there is space in the container. But I want to limit the space for the ...
Rob N's user avatar
  • 1,700
2 votes
0 answers
2k views

Stop macOS from creating synthesized disks from an APFS partition?

I have a raw dump of an APFS partition that I've created so that I can roll back a system to an exact state for testing. This dump was created using dd, and is not created form any of the volumes ...
Bri Bri's user avatar
  • 2,518
1 vote
2 answers
564 views

120GB SSD-Disk: More space "used" than the sum of all files

When I open the info-window about my start volume (120GB SSD), it says that 108GB are used, 12GB available. But the sum of the sizes of all folders and files (hidden objects included) in the root ...
ferdi2003's user avatar
1 vote
0 answers
60 views

Performance effect of dual-booting with APFS partitions

I have a 2013 iMac with a fixed disk, not an ssd. For unrelated reasons, I dual-boot it with two separate copies of macOS Catalina that share space in the same APFS container. Without knowing much ...
Pixelated Fish's user avatar
0 votes
2 answers
627 views

APFS Volume does not increase in size

I have an issue with an APFS volume that resides inside a SparseBundle. I tried to increase its size (similar to this: Is it possible to increase size of an APFS volume?), but failed. Unfortunately, I ...
Dietrich's user avatar
  • 201
11 votes
6 answers
11k views

How to use tmutil delete on Big Sur, APFS

I'm using macOS 11 Big Sur and APFS. I sometimes want to remove old backups to save space. I don't want Time Machine taking up the entire external drive. % tmutil listbackups 2020-10-18-001052.backup ...
Rob N's user avatar
  • 1,700
1 vote
2 answers
408 views

Can't boot into or mount Mojave APFS partition after repartitioning for Linux

MacBook Pro 2015, 256GB SSD disk I have created a second partition on my disk to try Linux. Everything was fine, but at some point, macOS disappeared from the boot menu. After some googling and trying ...
daniilkk's user avatar
2 votes
0 answers
418 views

Time Machine backs up complete drive as new data after failing to mount reference snapshot (after a restart)

Since January/February 2020, most restarts of my Mac (High Sierra) cause Time Machine to see the complete content of one of my two (internal) drives as new and copy it fully to my Time Machine ...
noirdesir's user avatar
0 votes
0 answers
1k views

Error - Space Manager Invalid

My computer was stuck in a boot loop so I connected the drive to another computer and ran fsck. i get the error "failed to read spaceman cib 0xfcfe" "Space manager is invalid" &...
Junaid's user avatar
  • 113
1 vote
1 answer
716 views

Big Sur - Time Machine structure

I'm running Big Sur and I noticed three things about Time Machine: if I format a drive as HFS+ and then I choose it for Time Machine, it gets automatically converted to APFS without asking; once a ...
user3534974's user avatar
2 votes
0 answers
3k views

APFS Volume on ext. Disk not mountable - space manager is invalid

I was using a APFS external USB Disk on a PC using a commercial driver. Suddenly it stopped being accessible.. Now I can´t mount the Volume inside the APFS container anymore, on PC but also not on a ...
derhottevomdorf's user avatar
0 votes
1 answer
3k views

MacOS Unable to use “(free space)” in BigSur

I have used disk Utility to delete a volume and then used command line, diskutil to remove the container using, diskutil removeContainer Now when i type diskutil list all i see is (free space) which ...
Uday Koushik's user avatar
1 vote
0 answers
377 views

Recover Apple CoreStorage Volume, LVG, Logical Volume Group -container / partition / volume

I wasn’t able to mount the disk on my MacBook (I had removed both hard drives from iMac, since it’s logic board went bad and I thought not to put more money on Apple products due to such bad hardware ...
Anonymous's user avatar
0 votes
1 answer
3k views

What is invalid internal_flags (0x28000) warning?

I have an external hard drive with 1 HFS+ partition and 3 APFS partitions. When I run Disk First Aid (in High Sierra), it finds no problems with the HFS+ partition. It also reports "drive appears ...
Rob Lewis's user avatar
  • 235
1 vote
2 answers
12k views

How to make remove free space and make APFS container take it up

I am on 11.1 Big Sur beta. I have a partition with no disk identifier called (free space) I would like to remove this, and then make the APFS container take up the free space. Here is a screenshot of ...
user avatar
-1 votes
1 answer
444 views

BigSur Kext's mysteriously disappears in recovery terminal but shows up from user terminal

i noticed a strange behavior after upgrading to Big Sur on my INTEL cpu gpu MacBook 2015. The below amd kext's show up in /System/Library/Extensions while logged in as a regular user, but, they ...
ElevenCents's user avatar
0 votes
1 answer
683 views

How to remove a container disk and reclaim space with boot partision?

I want to delete Apple_APFS container disk1 and reclaim the space to disk2. I boot on disk2 (Macintosh HD).
Denis Paciorkowski's user avatar
1 vote
0 answers
76 views

Case-insensitive view over a case-sensitive file system?

Steam for macos doesn't work on a case-sensitive file system. A common solution is to create a dedicated virtual image and mount it as a volume. However, because my such image is running out of space, ...
zakmck's user avatar
  • 394
2 votes
1 answer
483 views

Is it true that we could dual boot Mojave and Catalina, in the same APFS partition, and they don't have to have fixed sizes?

Is it true that if we dual boot Mojave and Catalina, or if we dual boot Catalina and Big Sur, we can go the traditional way of creating two APFS partitions, and each partition is one container and in ...
nonopolarity's user avatar
  • 9,608
0 votes
0 answers
215 views

How to make the APFS container bigger, when Disk Utility always create a new, empty APFS container?

I found blogs to shrink an APFS container, but not to grow it. There is one Stack Overflow post about growing it: https://stackoverflow.com/questions/47704458/how-do-you-increase-the-size-of-an-apfs-...
nonopolarity's user avatar
  • 9,608
2 votes
0 answers
243 views

Move files across apfs volumes in the same container

To prevent data loss from accidental deletion of files, I use Carbon Copy Cloner to make snapshots on my system volume. I just realised that for things like VM and tmp files it's a better idea to put ...
Joy Jin's user avatar
  • 2,833
3 votes
0 answers
193 views

Revert an apfs volume to the state of an earlier snapshot

Recently, I have a problem with slow login. I copied the system to another Mac and is trying different things to solve the problem. To be clear of what exact method works, I plan to restore to an ...
Joy Jin's user avatar
  • 2,833
0 votes
0 answers
37 views

How do I bring back my lost space after trying to merge APFS partitions?

How can I merge primary APFS partition with other empty APFS partition? After reading and following the above, I got stuck on the eraseVolume "Free Space" and now that space seems ...
Theo Mavrosavva's user avatar
6 votes
1 answer
3k views

What is APFS "Disk User" and how to add multiple crypto users via diskutil?

I recently learned that it is possible to encrypt an APFS volume within a container from the CLI using the diskutil command like so: diskutil apfs encrypt -user disk disk3s1 where disk3s1 is the only ...
joshua.r.smith's user avatar
3 votes
0 answers
250 views

Catalina system and data volumes with "find"

I sometimes find it useful to be able to search my entire hard disk with the "find" command, but I want to exclude all volumes on external drives. I have a script that I use in lieu of the &...
Jeffrey Simon's user avatar
0 votes
0 answers
43 views

Unallocated Space after BootCamp not restored to main HD

I am unable to reclaim 1 TB of Unallocated Space to my main HD. Neither Disk Utility or BC-Assistant succeeds in restoring it to a single partition. The underlying issue (after running sudo diskutil ...
Smeagol's user avatar
0 votes
0 answers
38 views

Delete unrecognized afps local snapshots

When using diskutil list in Recovery, I can see 20 disk images that are certainly localsnapshots from Time Machine. I need to remove these disks so I can use Bootcamp Assistant. I have disabled Time ...
Evan's user avatar
  • 121
1 vote
1 answer
107 views

Merge missing disk partition on a Macbook

I tried to install a Linux distro on a partition in my macbook, but it didn't go well so i want that partition to merge it to my main partition of the OS, but in the disk utility doesn't appear. If i ...
Alexandru Oprea's user avatar
1 vote
1 answer
2k views

Expand APFS container using free space located before the container within macOS

I have an SSD (disk0) that contains my macOS Mojave installation. SIP is enabled (and for reasons outside my control, cannot be disabled) so I cannot give the output for gpt -r show disk0 nor can I ...
Kittywhiskers Van Gogh's user avatar
1 vote
0 answers
56 views

Trying to recover APFS (Sorry I know this has been posted about 1x10^x times)

Early 2013 MBPr OSX 10.? APFS (Sorry don't know the exact release, don't boot OSX all that often anymore) - What I broke, also don't see any local recovery. Kali Linux - Bootable via rEFInd Windows 10 ...
firereverie's user avatar
2 votes
2 answers
3k views

Why can't I just dd an entire APFS disk?

I've received a new Mac that has come preconfigured with lots of junk. Naturally, my first order of business is to wipe the disk and clean install macOS. But first, I want to create a bit-perfect, ...
d4rk's user avatar
  • 23
0 votes
1 answer
57 views

is there a way to disable a drive bay from the command line?

Regarding a previous question I asked a while ago: Macpro 5,1 mid 2010 cannot boot to Mojave from Mountain Lion? I am wondering, is there any sort of default writes or other software solution which ...
patrick's user avatar
  • 435
1 vote
1 answer
97 views

In a Macbook, I'm ready to change the boot disk and replace the superdrive with an SSD. How will Migration Asst work? Use APFS?

In a mid-2012 MacBook running Catalina, I'm first going to replace the DVD SuperDrive with an SSD. Boot-up and then make sure the drive is recognized and wifi, Bluetooth, camera, etc. still work. ok. ...
rppkgai's user avatar
  • 369
4 votes
2 answers
272 views

Workarounds for "cp -p" not preserving nanoseconds on High Sierra with APFS?

I don't know if this affects MacOS versions newer than High Sierra, but it seems that cp -p won't preserve timestamps with nanoseconds resolution. Because of this, the shell can wrongly tell that a ...
cesss's user avatar
  • 161
1 vote
1 answer
303 views

Will enabling FileVault convert my HFS+ disk to APFS?

I have a 2017 5K iMac running Mojave 10.14.6. It has a 2 TB Fusion drive internally formatted as HFS+. FileVault is not enabled, but I wish to do so. Will the disk have its format changed to APFS ...
Paul Waldo's user avatar
4 votes
1 answer
4k views

Can't delete files from APFS volume -- no space left on device [closed]

My Late 2012 iMac's APFS Fusion Drive is full (53 KB free) and caused the system to freeze. I've rebooted into Recovery Mode but I cannot remove any files: rm XXX: no space left on device. fsck_apfs ...
bouke's user avatar
  • 1,237
1 vote
0 answers
195 views

Extra disk with 0 byte of storage showing on mac

I have a 2017 MacBook Pro 15". I recently removed a windows partition. Now the disk utility is showing an HFS+ volume with 0 bytes of storage. I tried to remove it using disk utility, recovery ...
Bhavyabhatia's user avatar
0 votes
1 answer
413 views

APFS - Catalina - Increase the size of a container

I have a 4TB external SSD. Running Diskutil I get /dev/disk3 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme ...
Michael Robins's user avatar

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