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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22
votes
4answers
12k views

Does Time Machine support APFS?

I just updated to macOS High Sierra. What's the best way to use Time Machine under Apple's new APFS file system. Should I use Disk Utility to convert my external Time Machine volume to APFS?
21
votes
1answer
2k views

APFS folder encryption?

From the feature list APFS supports per-file encryption. Hence by extension it should be possible to setup an encrypted folder (or at least just the files within that folder) with a password that is ...
19
votes
4answers
26k views

How can I merge primary APFS partition with other empty APFS partition?

Using the latest Macbook Pro with currently High Sierra 10.13.1, I was using bootcamp for a year, and I decided to get rid of the Bootcamp partition this morning. The Bootcamp utility would not let me ...
13
votes
5answers
28k views

Can you update to macOS 10.14 (Mojave) without converting to APFS?

At WWDC 2018 macOS 10.14 or macOS Mojave was disclosed. I am currently on macOS Sierra (10.12) and am looking forward to upgrading to macOS Mojave once its released. I was wondering if it will be ...
13
votes
2answers
8k views

Does it make sense to format an external HDD as APFS?

I’m currently on macOS Sierra and will upgrade to macOS High Sierra as soon as it comes out, which means my machine will be using APFS. I also have an external HDD (not SSD) that has quite a few ...
12
votes
4answers
13k views

What filesystems does iOS use?

I can't find this information documented anywhere. What filesystems do iOS devices use? Did Apple stick with HFS+? Is it different between devices and iOS versions?
12
votes
2answers
1k views

Replace existing duplicate files on APFS with clones

Is there a way to use the copy-on-write cloning feature of APFS to reclaim space from existing duplicate files? When you copy a file on APFS, it doesn't actual duplicate the file blocks, instead it ...
11
votes
3answers
9k views

How to prevent conversion to APFS on High Sierra install

The current understanding seems to indicate that "all SSD" machines will have at least their main/root file system converted to APFS on the install of High Sierra. That means HFS+ is still a viable ...
11
votes
2answers
945 views

APFS decreases space randomly

Since I upgraded to macOS High Sierra, one week ago, I have noticed that each time I wake the computer from sleep, the space left on the drive have decreased by a, somewhat, random amount. I have ...
10
votes
3answers
10k views

Migrate from HFS+ to APFS in-place

Using macOS Sierra, how do I migrate/switch/transition/upgrade the boot volume/partition from HFS+ to APFS in-place? Is this advisable, or perhaps already done by the Sierra installer?
10
votes
2answers
2k views

Is there a reason to prefer HFS+ over APFS for disk images in High Sierra and/or Mojave?

I'm creating small encrypted disk images (under 10 GB) to be used to secure and transfer data between systems running High Sierra (for now) and Mojave. Are there any technical reasons to prefer HFS+ (...
10
votes
3answers
17k views

APFS Errors: fsck can't repair

TL;DR Asked the same question on Apple communities, nothing useful. Find the post here: https://discussions.apple.com/thread/8123614 bash-3.2# fsck_apfs -d -l /dev/disk5 fletcher64_init:58: ...
9
votes
2answers
609 views

How can I tell if a directory has APFS Fast Directory Sizing enabled?

Apple's technical documentation in the Apple File System Guide describes that some directories like /tmp are not good candidates for the fast directory sizing feature. Fast directory sizing works ...
8
votes
2answers
4k views

3rd party SSD with High Sierra

If I install High Sierra on a 3rd party SSD, will the main volume's file system be converted to APFS? The hardware is a Early 2011 13" Macbook Pro with a Crucial M4 SSD.
8
votes
1answer
921 views

Is it OK to use an HFS+ start disk with High Sierra?

I have a clone of my internal SSD on an HFS+ partition of an external drive. I was wondering if there are issues with using such a disk as a startup disk with High Sierra.
8
votes
1answer
5k views

OS volume shows as type 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF' [duplicate]

Yesterday, I have tried to delete an Ubuntu partition. Since, my Mac (13", MBPro mid-2014) doesn't boot. Now, I boot on Mac OS copy with an USB. i follow different subject of this forum (like this : ...
8
votes
2answers
746 views

Replacing HDD with SSD; what about non-APFS/APFS?

iMac 27-inch, Late 2013, macOS up-to-date I would like to back up my internal HDD (non-APFS) with Time Machine. Then erase the HDD. Then have the HDD replaced with a new internal SSD. Then restore ...
8
votes
2answers
8k views

How to tell if I'm using HFS+ or APFS?

Using diskutil, or other command line tools, how can I determine which filesystem I'm using? # sw_vers ProductName: Mac OS X ProductVersion: 10.8.5 BuildVersion: 12F45
8
votes
2answers
3k views

MacBook pro mid 2014 with High Sierra and APFS - Overallocation Detected on main device

Can somebody explain what 'Overallocation' means in context of file system? I constantly see this message when trying to resize APFS partition, disk checks don't find any problems.
7
votes
5answers
17k views

How do you perform a clean install of macOS High Sierra with APFS?

I have macOS High Sierra installed on my MacBook Pro already with the APFS format. However, I would like to know the steps involved to perform a clean installation of macOS High Sierra with the APFS ...
7
votes
3answers
8k views

Resize APFS partition in Mojave

I'm attempting to resize a partition that's too small for my needs. Here's the output from diskutil list: ~> diskutil list /dev/disk0 (internal): #: TYPE NAME ...
7
votes
2answers
8k views

Can't resize APFS Container: Not enough free space in Container due to APFS limits or tidemarks

When I try to resize my APFS container, I get the following error: Error: -69531: There is not enough free space in the APFS Container for this operation due to APFS limits or APFS tidemarks (perhaps ...
7
votes
2answers
13k views

Cannot create Bootcamp partition on High Sierra APFS SSD disk

I am trying to create a Windows Bootcamp partition on High Sierra but when I got to select the target disk it tells me that there is no space left on the macOS container. My SSD has 250 GB free space ...
7
votes
2answers
7k views

How to prevent auto mounting of a volume in macOS High Sierra?

I am trying to prevent 2 volumes from mounting at startup. I created a new fstab using vifs and added the UUIDs of the volumes I don't want to mount at system startup, but for some reason this does ...
7
votes
1answer
8k views

HFS+ vs APFS: What are the pros/cons of converting HDDs to APFS?

I've got a few USB 3.0 HDDs I use for backup and game storage, all formatted in HFS+. What are the advantages/disadvantages of migrating to APFS on an HDD?
7
votes
2answers
1k views

Create an APFS RAM disk

There are various resources about how to create a RAM disk, but they all deal with HFS+ RAM disks. But how does one create an APFS RAM disk? I tried passing APFS as file system to the diskutil ...
7
votes
2answers
8k views

APFS/High Sierra - `tmutil deletelocalsnapshots` not deleting snapshots

Listing local snapshots yields this > tmutil listlocalsnapshots / com.apple.TimeMachine.2018-01-30-194719 com.apple.TimeMachine.2018-01-30-211627 com.apple.TimeMachine.2018-01-30-224917 com.apple....
7
votes
1answer
4k views

Cannot change APFS encryption password

I have a clean install of macOS High Sierra with APFS Encrypted file partition. During install I checked the "decrypt at login" option, but each have a different password. I now want to change my ...
6
votes
2answers
749 views

APFS - how do I enable transparent compression

How do i enable transparent filesystem compression on any APFS volume? Or check if it is already enabled? I am expecting something similiar to NTFS compressed attribute. According to Wiki it should ...
6
votes
1answer
973 views

APFS - Is it possible to install 2 macOS versions inside one APFS container?

As you might already now, a single APFS container can have multiple APFS partitions inside. Their advantage is the free space is shared between partitions. Today I decided to try out macOS Mojave ...
6
votes
2answers
4k views

I can't convert from HFS+ to APFS an external SSD volume I created for testing

I created an external volume with macOS High Sierra. When I try to convert it to APFS with Disk Utility, the "convert to APFS" is greyed out. I tried unmounting the volume first, then it's not ...
6
votes
1answer
3k views

APFS Encrypted vs APFS + FileVault?

I upgraded the SSD in a Mac Mini and I'm reinstalling Mojave via internet recovery. The disk is completely erased right now, and when creating a new partition it asks me if I want to choose APFS or ...
6
votes
1answer
10k views

APFS: fsroot tree is invalid after Time Machine backup - how to recover and avoid in the future?

System MacBook Pro, late 2013, 1 TB SSD (brand new, recently replaced by Apple), APFS (no journaling, case insensitive), High Sierra 10.13.2, Time Machine to network HDD. What Happened Mac stopped ...
6
votes
5answers
15k views

Windows 10 not recognized mac high sierra (APFS system) partition

Today i installed windows 10 ver 1607 on my macbook air with high sierra 10.13 on it. but i cant find my mac partition via windows 10. I tried repair it with step that suggested in this forum: How ...
5
votes
3answers
761 views

How do I know if a time machine backup is running?

Due to APFS having a mind of its own and filling the hard disk with unwanted snapshots, I made a cron to run tmutil deletelocalsnapshots xxx. Later I found out that running this command while a backup ...
5
votes
2answers
5k views

How does APFS on macOS handle upper/lower case file names?

So I recently learned here that HFS+ is case-insensitive but the APFS on iOS is case-sensitive. Is there a publically accessible documentation/reference which describes how APFS does handle upper/...
5
votes
1answer
4k views

MacBook Pro - How to resume APFS decryption process?

I was decrypting a drive from Recovery menu and I restarted machine because it was taking a lot of time but now the decryption has been Paused at 42%. I listed all available options using diskutil ...
5
votes
2answers
3k views

200GB unused, but can't change APFS container size due to minimum requirement

I want to create a partition with a different filesystem but in order to do that I need to resize my APFS container. This container has 292,4 GB used space. Its minimum size is 500,07 GB. This ...
5
votes
1answer
149 views

Expected incremental backup performance on Mid-2015 MacBook Pro

I use Acronis True Image backup software on a new mid-2015 MacBook Pro Retina with a 2.8GHz processor and a 1TB SSD running High Sierra and APFS. Incremental backups, even when there's almost no ...
5
votes
1answer
2k views

APFS container over multiple physical disks

I have an encrypted APFS container with several volumes. The container lives on a physical partition (disk0s1), which is followed by more partitions (disk0s2, ...) with no free space in between. I ...
5
votes
2answers
44k views

Partition problem with APFS containers in macOS High Sierra

As always I'm so impatient and migrating with my main devices to the first developer previews the day they are available. Which as always bring me only problems but I just cannot help myself. So ...
5
votes
1answer
3k views

Change APFS Volume to case sensitive

I have a macbook pro with 1TB internal glued flash drive, of which around 600GB are full. I would like to change the volume format from APFS (case insensitive, encrypted) to APFS (case sensitive, ...
5
votes
1answer
11k views

Problem while updating to macOS High Sierra (Target is not convertible to AFPS)

I started my update at night and woke up in the morning to this screen, stuck at the same place for hours now. The error log is a long sequence of the same two lines. isConvertableToAPFS: was called ...
4
votes
3answers
6k views

How to delete all local TimeMachine snapshots

I have automatic backup enabled and local TimeMachine snapshots take a large amount of disk space. This space is listed as purgeable in disk info, but cannot be actually used until the system decides ...
4
votes
2answers
1k views

How to install windows on Macbook Pro having Apple File System?

I've MacBook Pro Retina, 15-inch Mid 2015 having 250GB SSD storage. I'm trying to install Windows 8.1 (which my MacBook supports as per Apple's Documentation for BootCamp) but not able to do so, in a ...
4
votes
2answers
751 views

Why does Refind break when upgrading from Mac OS High Sierra (HFS) to Mojave (APFS) on NVMexpress Macs?

Problem: NVMExpress Macs that have Refind do not see the APFS container and I cannot boot into my mac. Also, apologies to those who were aware of this solution, but I faced this issue along with ...
4
votes
2answers
8k views

macOS partition disappered after installing windows 10 using bootcamp

I use a macbook pro 2015 with macOS High Sierra. I installed windows 10 using bootcamp, which resized the macOS partition and created a 80GB windows partition. The machine boots into windows just fine....
4
votes
2answers
23k views

Is it safe to remove APFS containers?

I have upgraded my Mac to High Sierra. So I was just looking at the features when I saw APFS container in Disk Utility. I googled it and found out that it is used for multiple logical drives but I ...
4
votes
1answer
3k views

How does APFS encryption work?

I recently upgraded my 2013 MBP to High Sierra. This changed my unencrypted file system to encrypted APFS. Does Apple provide any information about how APFS encryption works? Does the account ...
4
votes
2answers
10k views

Switch back to HFS+ from APFS

Recently I heard about new apple file system. Of course I wanted to try it. So I moved all files to one external hard drive for safety... And accidentaly switched it to APFS... How to revert changes? ...