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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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1answer
465 views

How many APPLE_APFS partitions is a disk allowed to have?

I am using macOS High Sierra Version 10.13.2. The following two examples indicate that a disk is only allowed one APPLE_APFS partition. The output below from a Terminal application window shows that ...
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0answers
179 views

Apple MacBook Pro with Touch Bar gets error mesage when reinstalling macOS High Sierra: Could not establish pre start volume for APFS installation

I get the following error message when reinstalling macOS High Sierra: Could not establish pre-start volume for APFS installation. How do I resolve this?
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3k views

APFS on RAID: recommended course of action?

I recently upgraded my Mac Mini Server's dual SSDs and found myself needing to re-create the RAID-0 array from scratch. (I am running the mainline High Sierra 10.13.1 on a 6,2 MacMiniServer from 2012.)...
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1answer
1k views

APFS partition disappeared after creating hybrid MBR

After trying to create hybrid MBR for dual-booting Windows in UEFI and BIOS with gdisk, main APFS partition (container) disappeared, leaving empty space in GPT partition table. It's only possible to ...
2
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0answers
534 views

Lost partition after trying to run BootCamp on 10.13 on APFS. How to recover?

After trying to install Windows via Bootcamp on (yes I understand what "beta" means) beta High Sierra 10.13 I was left with unbootable partition: I cannot mount this disk. It's shown as "Mac OS ...
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2answers
885 views

APFS technical documentation

Is any technical documentation available for Apple's new File System. By technical, I mean File System's internal structures, File allocation block etc. If Apple has not released any documentation, ...
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1answer
226 views

What are the drawbacks to reformatting my hard drive back to Mac OS Extended (Journaled) from APFS

I am concerned about not being able to use Time Machine to back up my drive. I've been told that was due to my disk being formatted as APFS. What must be done to return my Mac to Mac OS Extended (...
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3answers
4k views

Cannot partition w/ Boot Camp Assistant on macOS Mojave

Late 2016 Macbook Pro running Mojave 10.14.3, APFS-formatted (ugh). I have run Disk Utility to verify my disk, and I've run fsck -fy from single-user mode several times. Both of these have reported ...
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2answers
3k views

How do I split Fusion drive on Mojave / APFS?

I have a 2013 iMac (27" 3.5GHz i7, model id iMac14,2, EMC 2639) that has a Fusion drive. I want to replace the Fusion's internal HDD with an SSD. My understanding is that I should split the Fusion ...
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1answer
454 views

External drive APFS encryption secure?

I just erased a newly purchased external USB disk using the Disk Utility program and set it to use the file system APFS Encrypted. I entered a strong password and the whole process took about a minute,...
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1answer
29 views

Is it possible to roll back to the last saved version of a file in mojave?

I am not sure if I read that APFS functionality correctly but I have read that Mojave stores a kind of file time machine and that I could browse previous versions of files on the filesystem. I was ...
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2answers
3k views

Slow write speeds with APFS encryped external SSD

I bought an external SSD with a USB 3.1 gen 2 enclosure. I'm on macOS 10.13.6 with a MBP (late 2013). Using APFS I get write speeds of around 390–405 MB/s. So far, so good. However formatting the ...
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1answer
44 views

Using hard disk after a S.M.A.R.T. error

Good day everyone. I had an hard drive and start giving a S.M.A.R.T error and I've immediately replaced it. Now if I try to format it in exFAT, all goes right, (also checkdisk). Here is the result ...
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1answer
55 views

4 hd in my MacBook Pro

I have 4 hd in my MacBook Pro. Macintosh HD - system disk. But where did the 3 other disks come from and what to do with them?
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1answer
375 views

How does iOS change file system format during upgrade to iOS 10.3?

During upgrade to iOS 10.3, the file system format will change from HFS+ to Apple File System (APFS). How can the process retain the user data when changing file system format (how reliable it is? ...
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1answer
289 views

Extand main APFS partition on MacOS Mojave 10.14.3

As it can be seen from the screenshot below my APPLE SSD is of size 500GBs, but my Apple_APFS Container disk1 is of size 450GBs. There was a Container disk 2 of size 50GBs before but I successfully ...
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1answer
125 views

Should I create APFS encrypted disk image on hard disk drives?

I'm about to create an encrypted sparse disk image on my HFS+ formatted hard drive, but then I wondered if APFS's drawbacks on HDDs will mean anything in this case, since the hardware is anyway on HFS+...
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1answer
419 views

APFS and HFS+ volumes on the same partition

I wish to have two volumes on a drive (not SSD); one HFS+, one APFS. Would it be better to have these on an HFS+ partition or APFS?
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1answer
289 views

What is the correct way to eject a APFS dmg from the command line?

Create a APFS DMG using Apple's Disk Utility application and call it test_apfs.dmg. One can mount it with: hdiutil attach -plist ~/Desktop/test_apfs.dmg which provides the following output: <?...
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1answer
2k views

How to upgrade to 10.13.3 with fusion drive on apfs

I installed High Sierra via the app store, the regular way. In the process the fusion drive of my mac mini was converted to apfs. I am still on 10.13.1, and wondered, why available upgrades did not ...
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1answer
654 views

Getting Errors. I need help downgrading to Mountain Lion from High Sierra through internet recovery

I can't find a disk to select to install OS X in Internet Recovery Mode. Also I can not erase the disk or partition. I gave all the details. Two days ago I decided to do a clean wipe on my MacBook ...
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1answer
5k views

How to mount an APFS formatted volume created on macOS 10.12.1 on macOS 10.12.2?

According to this thread from Apple Developer Forums, an APFS volume created on macOS 10.12.1 is not mountable on macOS 10.12.2, because of the incompatible changes. I put some important files in my ...
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1answer
67 views

Can't convert to APFS in Mojave

Just bought a mid-2014 MBP from ebay and I tried to update to Catalina but it said I need APFS to do that. I tried disk utility but the option is greyed out. I NEED a way to do it non-destructively. I ...
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1answer
57 views

Accessing unmountable APFS Volume on a disk image

I have run into trouble with APFS. I have an external hard drive (spinning plates) with two partitions. Some time ago one of these partitions stopped being mounted. Neither Disk Utility nor running ...
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1answer
42 views

How to set a different encrypted boot volume without unlocking?

I have two MacOS installs as part of a dual-boot configuration on my MBP. Both happen to be Mojave 10.14. They are installed on two encrypted APFS volumes in the same APFS container. I want to be ...
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1answer
40 views

How to use `tmutil compare snapshot_path`?

man tmutil shows compare [-@acdefglmnstuEUX] [-D depth] [-I name] [snapshot_path | path1 path2] If a snapshot path is provided as the sole argument, tmutil will compare the computer to the ...
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1answer
95 views

How to resize (grow) APFS partition that is at the end of the drive?

[new info below post] -- I'm having trouble resizing an APFS partition on the 240Gb SSD in my Mac. I want to make all space available to the system partition "Macintosh SSD". Output of diskutil list: ...
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2answers
441 views

Cannot resize APFS partition - “The new size must be different than the existing size”

I have a 1TB SSD on macOS High Sierra 10.13.6 with the following APFS partitions: $ diskutil list /dev/disk0 (internal): #: TYPE NAME SIZE ...
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1answer
798 views

Can't format drive to APFS on older machine prior to 10.13 install

I have a Mid-2012 15" MacBook Pro that I've just put a new SSD into. I didn't format the SSD prior to putting it into the computer, my plan was to boot into "recovery mode" (not sure of Apple's term ...
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1answer
642 views

Fix a sometimes happening prohibitory sign 🚫

Well, I know there's an answer to a similar question here: Getting a 🚫 sometimes on boot, but this is slightly different. My system is running on external drive. Actually on an external ...
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1answer
494 views

I erased an APFS Volume containing a second OSX installation (trying out Mojave) but my Mac keeps trying to boot into it

I added a Second Volume to my Main APFS Container to install and try Mojave (I'm running High Sierra). I decided that Mojave is not for me and I erased the volume from Disk Utility. My Mac still ...
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1answer
575 views

How Do I Create A VirtualBox VM From An Existing macOS Mojave APFS Volume?

I saw a related post but the instructions were specific to VMware Fusion, which I am not using. With Carbon Copy Cloner, I created a bootable backup of the existing macOS Mojave installation that I ...
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1answer
384 views

Mac randomly crashes, main boot volume disappears

Retina Macbook from 2017 running Mojave here. Every few days, my mac suddenly and randomly freezes (sometimes at times without user input) and crashes. When it tries to boot again, it fails and ...
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1answer
709 views

Failed attempt to fix macOS partition startup volume set to FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

I attempted to fix an issue I encountered yesterday my MacBook Pro (13-inch, Mid 2012) following instructions in the top answer of this thread. I'm afraid I may have inadvertently destroyed my data by ...
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1answer
1k views

How to convert FusionDrive to APFS?

Backstory: Installation of MacOS Mojava failed on my late '12 iMac with exception: com.apple.DiskManagement error -69854. I can find few other questions with this problem, but the general consent is, ...
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1answer
181 views

Missing space on GPT drive sharing FAT and APFS volumes

I have a 500GB SSD with a 280GB NTFS volume, and a 180GB APFS container. The output from diskutil and gdisk are below. I resized the NTFS volume to 280GB from 300GB using the disk mgmt MMC in Win7. ...
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1answer
123 views

Reinstalling MacOSX on MacBook from scratch (deleted Macintosh HD volume)

I had Bootcamp Windows on my MacBook Pro. When I wanted to resize the partition and reinstall windows, I opened Bootcamp app but couldn't do it for some reason that I don't remember. Therefore, I used ...
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1answer
567 views

APFS - Have I reinstalled MacOS correctly?

I tried to dual boot into linux the other day and accidently ended up messaging my boot volume - the machine ended up booting only into Grub resuce. I ended up using diskutil to erase the Linux ...
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1answer
211 views

local snapshot not restoring in APFS file system

Using tmutil localsnapshot I was able to create snapshot(in this format: com.apple.TimeMachine.2017-12-28-032610), but was not able to revert to this snapshot using tmutil restore since APFS doesn't ...
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1answer
282 views

My 2TB external drive keeps disappearing every time I boot my Mac

I have an external LaCie Porsche 9223 2TB drive connected to my Macbook Pro 15 (2015) via USB3. After I converted it to APFS after upgrading to macOS High Sierra, it keeps disappearing randomly from ...
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1answer
806 views

Corrupted external (encrypted) apfs drive on High Sierra

I'm having trouble accessing data on my external USB disk called G-DRIVE USB - it just won't mount. I get the prompt to unlock, which I do, but it does nothing. DiskUtility fails to open when this ...
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1answer
333 views

Will migrating an SSD drive to APFS prolong its life?

For Apple hardware that ships with SSD only storage, will switching the file system from HFS+ to APFS prolong the life of an SSD drive?
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1answer
1k views

APFS doesn’t fully support AFP

After I upgraded to High Sierra's APFS, afp://ipadress no long show me files on the remote computer’s APFS drive (only spinning drive shows up, and if the remote computer doesn’t have a spinning drive ...
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1answer
3k views

FileVault Encryption Issues On High Sierra (APFS)

I've recently updated to High Sierra and am now having issues with the encryption of my SSD. When upgrading I was prompted to create a new password for my user account, the dialog saying that I ...
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1answer
2k views

Can't boot from external APFS formatted SSD

I have a Mac mini with macOS High Sierra and an external SSD drive connected via USB also with High Sierra on it. After converting the external SSD to APFS it doesn't boot anymore - my Mac can't see ...
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1answer
2k views

macOS partition not showing up after High Sierra update

I updated my MacBook Pro mid 2015 to High Sierra from Sierra. Update was successful and everything worked perfectly for nearly 6 hours. Then MBP hung and I had to hard power off since it wasn't ...
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2answers
763 views

Still not possible to convert HFS+ Journaled boot to APFS?

We're at High Sierra beta 9, and it still doesn't seem possible to convert an HFS+ Journaled boot drive "in-place" to APFS. I tested this with a totally fresh install using a late 2014 27" Retina ...
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1answer
186 views

What is the benefit of nanosecond granularity?

Apple recently announced a new file system for Apple products, Apple File System (APFS). Amongst the characteristics, is Nanosecond Timestamp Granularity. Sure, this sounds impressive, and is a great ...
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0answers
15 views

Snapshot hell? Unable to free space on macOS Catalina

Like many others I am unable to clear up space after deleting files. I tried clearing snapshots: # tmutil listlocalsnapshots / Snapshots for volume group containing disk /: # tmutil ...
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0answers
30 views

APFS partition error

So I've searched for a while and found several answers but I don't want to take a chance with the wrong command and wipe data so I'd like instructions specific to my case please. I resized my ...