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Questions tagged [filesystem]

The system used to format and organize files on a disk. This includes directory structure, permissions management, metadata, and more. The current default file system for macOS is APFS (High Sierra and higher) and HFS+ (Sierra or lower).

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How to view logs of deleted folders

2 days ago I edited some files on my iMac. I came back today and inexplicably there was no folder containing those files. I would like to know how to view reports of files deleted during this sort of ...
Hormandillo's user avatar
1 vote
1 answer
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Time Machine telling me I don't have enough disk space to restore a 64GB file despite having 78 GB free

I'm trying to restore a Docker.raw file which reports 64GB to the os but actually only takes 5 GB on disk. When I try to restore the file from time machine, it't telling me I don't have sufficient ...
StevieD's user avatar
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2 votes
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Any app to snapshot and display system modifications - use: before and after application install

I am looking for an application that works on silicon macs that can snapshot my system and compare two snapshots showing me file creation/modification changes. A long time ago there were a few apps ...
ycbsrn's user avatar
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Install Rocky Linux 9.4 on MacBook Air (13-inch, Early 2015)

Yesterday, I decided to install Rocky Linux 9.4 https://download.rockylinux.org/pub/rocky/9/isos/x86_64/Rocky-9.4-x86_64-dvd.iso on my MBA (MacBook Air, 13-inch, Early 2015) https://support.apple.com/...
joseluisbz's user avatar
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File picker forgets last location (always uses home folder) and can’t access recent folders

In all apps, when I summon the “File, Open” dialog (file selector, file picker), it is supposed to open with the last location accessed. But instead, it is always opening at my home folder. Also, any ...
2540625's user avatar
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2 votes
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Can the GUID disk signature be changed without reformatting a disk partition/drive?

After recently having some issues with an 8TB Seagate drive, I bought a new replacement to backup, and realised I have this dock sitting here with dual bays that can clone a disk far faster than any ...
Lee Lawrence's user avatar
1 vote
1 answer
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How big was my latest Time Machine backup?

I can't find anything that tells me how big the latest Time Machine backup was. For most folders, you can choose "Get Info" and it tells you the size of the folder. But when I do that for ...
civieric's user avatar
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69 views

Hidden Xcode folders on macOS 14.4.1

Mac Mini M1 2TB 16GB macOS 14.4.1 Xcode 15.3 I've noticed that in my /Applications folder, I have a number of hidden items. These are: As you can see, they are taking up a fair chunk of my disk ...
carlcaulkett's user avatar
1 vote
1 answer
89 views

How to replace Finder and make SpaceDrive as the default file explorer on Mac

I have started using Spacedrive on Mac. But the default Finder is still in use. I want to replace Finder and use SpaceDrive as the default Explorer, such that all default actions such as save file, ...
frewper's user avatar
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12 votes
4 answers
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How do I find broken symbolic links in macOS?

I would like to learn, how to find broken symbolic links, recursively given a path. Just as a precise reference of what I am looking for, the Linux equivalent (that does not work in macOS) would be ...
nostromo's user avatar
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What's with this /u symlink that points to /Users?

There's a symlink in my root directory called u. It points to Users. It looks like it's being created at boot time, but idk if that means anything. I don't remember this being part of a normal macOS ...
smammy's user avatar
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1 answer
107 views

How do I mount a disk using MacFUSE?

I have an old harddisk that's formatted as HFS, which I would like to read on my modern Mac that runs Ventura. I've got the physical connection covered: I've connected the HD via a SATA/PATA to USB ...
Hobbes's user avatar
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1 vote
1 answer
149 views

Where are the TimeMachine Backup snapshots in Terminal on macOS Ventura?

I have set up a new Apple Silicon Mac and attached an external drive as Time Machine. The Time Machine drive I can see in Terminal as $ ls -1 /Volumes ... Persistently ... And in Finder I can in the ...
halloleo's user avatar
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3 votes
1 answer
162 views

Undeleteable (dataless?) folder in MacOS: Permission denied, compressed chflag

I'm having a problem deleting a folder that was previously managed by Microsoft OneDrive. The folder is called "WP". I already tried: sudo, disabling SIP, removing chflags. ❯ csrutil status ...
tholu's user avatar
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1 answer
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Is the Date Created file attribute in finder a reliable install history timestamp to reference?

I'm looking at my MacOS /Applications folder and looking at the Date Created column and was surprised to find a date newer than the date of a .band file I created from GarageBand which is listed as 2/...
jxramos's user avatar
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50 views

Can't remove systems folder from a faulty installation of Mac Catalina

I had Mojave installed on my late 2012 Mac mini, and attempted to install Catalina on it using the internet recovery mode. This install was made to the /Volumes/Local disc, and it failed miserably not ...
holroy's user avatar
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0 answers
22 views

What is the group _appstore, and why are large number of files in this group?

What is the group _appstore? I have a folder with quite a few files in it. Until recently, the files would have had ownerhip of jas:staff, where jas is my username. I noticed recently that many files ...
Jeffrey Simon's user avatar
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0 answers
21 views

How to prevent application from access Autosave Information folder under /Users/user/Library

I've created a UI based Application that attempt to access a restricted folder which require user consent as can be seen in the following popup window. According to fs_usage analysis, the file seem to ...
Zohar81's user avatar
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How to increase ulimit file limit for mac sonoma? [duplicate]

Here is the step I followed Step 1: Create new file /Library/LaunchDaemons/limit.maxfiles.plist Step 2: paste the following content <?xml version="1.0" encoding="UTF-8"?> &...
olaf's user avatar
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0 answers
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How to recover a deleted screen recording that was recorded using Screen Recorder on a Mac?

I'm exploring the possibility of recovering deleted screen recordings that were created using the default system Screen recorder application on a Mac Monterey OS version 12.2.1. Where will the ...
Alexey Vovchenko's user avatar
0 votes
1 answer
92 views

How to reduce inode usage when there are only 6 files

I am trying to clear the inode usage on my thumb drive on a Mac 11.7. It has plenty of memory, but the ifree is 0. I followed the advice in this answer, but there are only a handful of files left. I ...
thestarsatnight's user avatar
1 vote
1 answer
80 views

"reflink" filesystem API for macOS?

On linux, we have the call int ioctl(int, FICLONERANGE, struct file_clone_range *); to "reflink" files. APFS also supports COW and thus a similar system call should exist. However, the ...
Ma Joad's user avatar
  • 411
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1 answer
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How to show correct Content creation date for photos/files in Finder

How do I see the correct Content creation date in Finder? I know from looking at the metadata on my phone (which the photos are synced with) that they should contain the correct date. About 2100 files ...
ssssaaaa's user avatar
  • 395
1 vote
0 answers
32 views

Does using "chflags hidden" generate file system events?

If a macOS application is using file system events to monitor files (and folders), will it receive notifications for changes caused by the user running chflags hidden and chflags nohidden on a file (...
mhucka's user avatar
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3 votes
1 answer
585 views

Missing free space after Sonoma, and it's not Snapshots!

After upgrading to Sonoma I've been running out of disk space (and application memory) even tho Finder shows 300+GB free. I read about it being a common problem with too much Time Machine snapshots in ...
Henry Mazza's user avatar
1 vote
0 answers
57 views

How to extract a 'hidden' system font named zt-Mac from Mac OS 9?

There's a specific font in Mac OS 9 called zt-Mac that I'm dying to use. I'm running Sheepsaver to access OS 9, but want to pull this font out. Unfortunately the font doesn't seem to be within /System/...
bitterlake's user avatar
1 vote
3 answers
311 views

How can I edit Books’ metadata on iOS?

On iPhone SE 2 running iOS 16.6.1, there is no feature to edit the “Author” field in the Books app, for PDFs. There is no feature to edit the metadata of files in the Files app either:
Julius Hamilton's user avatar
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1 answer
149 views

Unable to create directory under /usr

I'm porting a program from Linux and Windows to macOS, and we use /usr/tmp, I can switch to /usr/local, but it puzzles me why not root can create a directory there that I can chown and use with my ...
MortenB's user avatar
  • 103
1 vote
0 answers
26 views

MacOS creating SFS (Self-certifying File System) group

Attempting to run the SFS file system toolkit (http://www.fs.net/). As I executed ./configure, an error shows with message configure: error: Create sfs user/group or use --with-sfsuser/--with-sfsgroup....
Frank Wu's user avatar
0 votes
1 answer
191 views

How can I speed up Time Machine backups that intermittently taking way too long?

I've long been amazed how fast time machine backups can be these days (well, years); even for really gigs of data. But recently sometimes my backups take forever. It seems to be independent of how ...
Joanna Bryson's user avatar
1 vote
1 answer
302 views

How to safely clean up resource fork files?

I'm trying to clean up my hard drive to recover some disk space. Part of what I'm doing is merging two large directories of image files that I know have lots of duplicates because they were two copies ...
qazwsx's user avatar
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2 votes
1 answer
81 views

Folder contains invisible file whose name starts with ..\..\

I have a Visual Studio for Mac project folder that contains an unusual file: The file is only visible with ls -A in the terminal, and its name is ..\..\items.json: ~/Projects/Boss/Boss/bin/Debug % ls -...
Plunder Bunny's user avatar
1 vote
1 answer
155 views

User files ownership anomalies on MacOS 14.0

I've been using a Mac Studio system now for a couple of years, and a now I am running into permissions problems when trying to set up a web server. It was only recently that I noticed ownership ...
Dennis 's user avatar
  • 115
0 votes
1 answer
44 views

Mac converting to roman letters with diacritical marks automatically

All files on my mac has had åäö converted to aao with equivalent diacritical characters (so they look exactly like åäö but are in fact combinations of "a" and a diacritical mark that looks ...
Henrik's user avatar
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1 vote
2 answers
536 views

Command to format a raw floppy disk image with FAT12?

I'm new to OS Development, and I want to format a 1.44MB floppy image with the FAT12 file system. I created the disk using dd if=/dev/zero of=<my image> bs=512 count=2880, so it's just a raw ...
axolotlKing0722's user avatar
0 votes
0 answers
76 views

How to retrieve the data of the apps and the system

Not sure if this is even possible, but it is very important for me and I could not read the answer yet. Before iOS I had this Linux OS that is not a Android. I was able to retrieve a SQLite database ...
dgad's user avatar
  • 1
5 votes
1 answer
571 views

Why do I get `Bad file descriptor` when copying using hardlink flag?

Every once in a while I find that I need to use the -rl options of cp to clone a directory tree using hardlinks. This has always worked fine on Linux, and I can see that the BSD cp command accepts the ...
oligofren's user avatar
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1 vote
0 answers
42 views

How can I modify the "Date Added" of a file via the terminal? [duplicate]

Whenever I move files between folders or to an external hard drive, I lose the "Date Added" metadata of the files. I need this info for sorting purposes. How can I change that field via the ...
JStyle's user avatar
  • 11
4 votes
2 answers
1k views

Voice Memo file location, Ventura 13.5.2

Up until two days ago, my voice memos happily lived in ~/Library/Application Support/com.apple.voicememos/Recordings. Every time I'd record something, an m4a file would pop into that library, which I ...
ezuk's user avatar
  • 141
0 votes
0 answers
61 views

iPhone 13 photo and movie file suffixes have changed to strange characters, making them unusable

I move photos off my iPhone 13 (IOS 17.0) to my PC (Win 10) for further processing, using a cable. There have never been any problems until recently, where photos (RAW format) and movies now have ...
Lazarus's user avatar
  • 21
3 votes
1 answer
275 views

Deleting APFS volume doesn't free up any space

I had a corrupt APFS volume (caused by bad SATA connection — has since been alleviated) of 150 GB reported by First Aid so I decided to create a new volume and reinstall macOS there. In the end of my ...
Andreas's user avatar
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1 vote
0 answers
80 views

Unable to send compressed zip file from a Mac

I was given a Google link to upload a zip file containing some python scripts and screenshots. But for some reason I wasn't able to click on the required zip file when the Finder opened up, but I was ...
singleslit's user avatar
1 vote
2 answers
127 views

mounting a bit by bit copy of a partition in macos

Is it possible to mount a bit by bit copy of a partition in macos? I tried with mount -t apfs backup.img backup/, but it didnt work. Is there a better way?
CarriMegrabyan's user avatar
0 votes
1 answer
731 views

Can't edit hosts file on macOS 13.5 (sudo not working)

I don't have permission to edit the hosts file, even if I use sudo and turn off SIP. I use sudo vim /etc/hosts to open the hosts file. After entering :wq!, it shows: "hosts" E212: Can't open ...
SimpleMaxR's user avatar
2 votes
1 answer
128 views

Estimate "true" APFS disk usage of folder without counting cloned files multiple times

I would like to compute how much "true" APFS disk space is used by a folder. This folder has many APFS "cloned" versions of the same files. A "true" count of the disk ...
Mike Battaglia's user avatar
0 votes
0 answers
33 views

There is an extra "volume" in /Volumes with a similar name to an external hdd, that persists even when HDD is disconnected

Here is the output of terminal with external drive connected: eric@Mac f0 % cd /Volumes eric@Mac /Volumes % ls Backup Macintosh HD Heiffer Heiffer 1 eric@Mac /Volumes % ls -al ...
Eric R's user avatar
  • 41
1 vote
0 answers
2k views

Errors when running Disk Utility on APFS SSD (error: doc-id tree, volume corrupt)

On my Mac running Disk Utility / First aid produces errors that Disk Utility doesn't seem to be able to fix (full log at bottom). First: Checking the fsroot tree. error: doc-id tree: record exists ...
Sebastian's user avatar
  • 111
0 votes
0 answers
114 views

Is there a way to tell a FileProvider filesystem to keep certain files local?

I'm using a filesystem which is hosted on a cloud provider and is made available on macOS via the FileProvider API. While it seems to be the same framework that Apple's iCloud Drive uses, it doesn't ...
bjb's user avatar
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1 vote
0 answers
96 views

How Far Back Should My .fseventsd Logs Go?

I've been trying to diagnose an issue with fseventsd eating up a tonne of CPU time after a restart, and I've discovered that the .fseventsd folder on each of my volumes contains thousands of files ...
Haravikk's user avatar
  • 1,647
0 votes
1 answer
99 views

Mount a local directory in another location of the filesystem as READ ONLY?

I regularly, but manually, rsync a certain local directory (A) to a remote machine. More than once I have rsynced in the wrong direction and deleted stuff that was new in A. I have backups but it ...
d-b's user avatar
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