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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17 views

How do I find files lost since I upgraded to Catalina 15.0154?

I have a MacBook Air Catalina 10,15.5 When I upgraded to 10.15.4 however, I may not have backed it up my because now I've lost all my documents except those created since the update. All my photos, ...
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23 views

Parallels VMs double counted for disk space usage?

My Mac claims to be running out of storage, and when I look at my storage breakdown, this is what I see: However, when I look through the files, this is what I see: Documents appears to only be ...
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Does MacOS periodically purge older files in /Users/<username>/Library/Caches/…?

In the past, I put temp files in /tmp/ folder, and the OS automatically purges them as time goes by. I'm now considering using the alternative folder /Users/username/Library/Caches/myFolder/ but ...
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create file that can be mounted

I am trying to create a bootable filesystem filename.fs from a directory that contains all the OS files. My problem is that I cannot create a file that contains a filesystem. I found a explanation for ...
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117 views

Why does backslash work for file or folder names, but question mark less so?

I created a HTML file as this name on Sierra 10.12.6: test\55.html and it showed up in the address bar of Firefox as: Users/MYNAME/Desktop/test\55.html I then made a duplicate as test?\55.html and it ...
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36 views

What is this U folder under root /?

I found this folder under my root, not sure what it is. Anyone got an idea? drwx------ 5 root wheel 160 May 5 2017 casper drwx------ 3 root wheel 96 May 5 2017 dists drwx------ ...
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64 views

Files on my desktop seem to set themselves as hidden files (macOS Catalina), greyed out, even though they don't begin with periods

I have a strange and recurring problem on my recently upgraded Mac running macOS Catalina First of all, Catalina has a new feature where you can Show/hide the hidden files on your machine using Cmd-...
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Finder 'find' function finds nothing, no matter which directory is searched [duplicate]

Simple as that. Whatever I search (even copy pasting an existing file's name) finds 0 results. Doesnt matter if i search my mac or the current directory, it always comes up with 0 results. I tried ...
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Lock folder and all its contents such that it is temporarily read-only

I want to lock a folder from modification, which includes all its contents. I thought that this could be accomplished with the "Get Info" window and selecting the "Locked" checkbox, but this does not ...
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Can't find where Voice Control is located on the computer

I upgraded to Catalina and I'm using Voice Control, but it will not work in non-Apple software. I wanted to try giving "Full Disk Access" in Security & Privacy hoping it might work. I have the ...
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How to send photos from iPhone to Windows PC without cable and Internet

I am trying to send the pictures (and videos) I have to my Windows PC, but don't want to upload them to any cloud services. I cannot use USB because there is a problem with the socket. I can only ...
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How to list the Mail directory from the Terminal?

Is there a way to change the file or directory permissions so that I can list the contents of the Mail directory from the Terminal command-line in macOS 10.15.4? When trying to list the contents, I ...
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100 views

Catalina: Purpose of /System/Volumes/Data/Previous Content/?

After the update from Mojave to Catalina I noticed that the used disk space has increased from about 1TB to almost 2TB. And there is hardly any free disk space left. A closer inspection of the file ...
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18 views

How many installs of Emacs do I have?

At the zsh, I enter which emacs and get /usr/local/bin/emacs. In my /Applications folder, I have an application called Emacs. When I click get info it says that it resides at /Applications. So that ...
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How can I find all the files on my Mac that have any named forks?

How can I, from either the command line, any of the included tools, or some third-party tool, go through all the files on my Mac and list any that use "named forks". Such files should be very rare ...
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MacOS wont boot after partitioning my SSD

I installed Kali Linux on my iMac as Dual Boot. After a while I needed more space for Kali so I decided to shrink my Mac Partition (APFS) using MacOS Disk Utility Tool. I created a new 100 GB ...
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Catalina's usage of 15-plus GB in 'Other Volumes' versus Sierra

I have two Macbook Airs each with an SSD of about 120 GB, with the difference being that one has Sierra and the other has Catalina. The user data are virtually identical (though the one of Catalina ...
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Coping .a & includes files to usr/* directory to configure GTest on MAC OS Catalina Version 10.15.4?

Configuring GTest for on Mac OS Catalina Environment. Step in configuring GTest is copy static Library to /usr/bin location & next, is to copy include directory to /usr/local/include location. ...
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How to interpret the output of `mount` on Catalina

When I run mount on my system, it lists the following /dev/disk1s5 on / (apfs, local, read-only, journaled) devfs on /dev (devfs, local, nobrowse) /dev/disk1s1 on /System/Volumes/Data (apfs, local, ...
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Path to file listed in Recent documents?

I have the same "recent document" in both Numbers' Recent documents as well as in the system wide Recent documents (in the Apple-menu) but the document is gone. I would like to see the path where ...
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107 views

fsck_apfs fails with “btn: invalid value” and “Snapshot is invalid.”

I have an old MacBook Air running out of disk space, and DaisyDisk reports that 25 GB are taken by "still hidden". Following their suggestions, I've tried to run Disk Utility First Aid as well as a ...
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Many apps just disappeared from my machine after low storage warnings?

I was using my Mac last night, and at some point I got a warning that my disk had filled up. I checked Macintosh HD, and it reported having over 5GB free, so I ignored the warning. I started to notice ...
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Is there a way in MacOS to view filesystem details, including cluster size, for an already created exFAT partition?

I am interested in viewing the existing cluster size (aka allocation unit) and other FS details for an already created exFAT partition. My attempts in searching, including here, have only led to ...
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Apple photos takes seconds to load in file chooser dialog

See image below. The spinner takes almost 10 seconds before showing actual photos. I'm on a 2014 MBP with SSD and I have only around 16.000 photos (60GB in total). This slow loading time only occurs ...
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290 views

Reading HFS standard and MFS on Catalina

During the lockdown I decided to use some of my time to backup all the all Mac disks and floppies I have at home so I can store them in a somewhat more readable format that SyQuest cartridges and MFS ...
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41 views

Does TechTool Pro do anything that Disk Utility doesn't?

I have an 2010 iMac running High Sierra. My computer has been very slow lately and does a lot of beachballing. I've run Disk Utility on my internal drive and it returns that volume appears to be ok. I'...
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61 views

Rsync keeps copying the same file

I have used rsync for many years between linux filesystems without any problem with a very deterministic behavior. Now I try to use it on mac and experience some problem that some files (a small ...
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How can I convert the Macintosh HD volume from read only to write access? [duplicate]

I am running macOS Catalina and I am fully aware that system files are read only. I would like to change this without deleting system data or reverting back to Mojave. I need to write to the /bin ...
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1answer
410 views

Unable to create folder in root of 'Macintosh HD'?

I am running macOS 10.15.4 and I need to create a non-user specific folder at the based of primary volume (Macintosh HD), but Finder does not allow me (option greyed out) and from the terminal I get ...
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1answer
33 views

Putting files outside the home folder on Catalina

I have some large files in my home folder which are causing issues with Finder, and I need to store them elsewhere, but as of macOS Catalina, the root filesystem is Read-Only. I've seen some solutions ...
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32 views

Can't view contents of a certain existing folder

I have a flash drive formatted to ExFat with multiple folders, one of which contains various mp4 files. Likely because of some stupid decisions which include "Forcing the computer to shut down in the ...
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1answer
246 views

Is it ok to delete iOS Files from my macbook pro?

I have in my MacBook pro a folder called MyName iPhone. Which is taking up about 21gb of space. It seems like a backup of the phone. It says last accessed: 2 years ago which happens to be when I go ...
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170 views

What are all these files on my Mac?

I just did a clean install of the latest Catalina on my Mac. I was searching for my documents folder and all these files appear? What are they? can I delete it? is it possible is malware?
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96 views

Does “Erase all content and settings” help with potential Data partition file system issues?

Recently I have become concerned about the fact that there is no way of checking the filesystem integrity on the iOS platform short of rooting the device and running a manual fsck. If I were to handle ...
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How do I overcome “Operation not permitted” when attempting to edit a file as root (admin)? [duplicate]

I'm using Mac 10.13.6. I want to add environment variables to be recognized by my Apache instance. However, I'm not able to edit the file, event when logged in as root ... localhost:Documents davea$...
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677 views

fix: mismatch between extentref entry reference count

My MacBookPro 2019 (Catalina 10.15.4) recently started to show weird issues in disk utility: When validating the internal startup disk (SSD) it fails various times with: mismatch between extentref ...
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1answer
84 views

Which version of macOS introduced /System/Applications?

Today I discovered quite by accident that several applications are now stored in /System/Applications/. I realized this when I was trying to find the bundle ID of a built-in application, and even ...
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1k views

Why does installing a package create a directory on my desktop?

When I install a package, it creates a directory with the name of the package on my desktop. In Finder it looks like a new external drive: Why is that? Should I always remove those drives after ...
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Which file system should I use for Micro SD card, APFS encrypted or HFS+ encrypted?

I have a 256GB Micro SD Card (TF Card). I plan to use it as an external storage to my Macbook. I don't care about the portability. So no need to use exFAT file system. To be safe, I plan to use ...
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Should I still use case insensitive file system in Mac Mojave?

I switched to Macbook from Linux OS. In the beginning, I was using high sierra and people recommended to use case-insensitive file system because some apps may not work with case-sensitive file system....
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Do power logs in the iOS file system only store for ~5 days?

Ive been browsing through the iOS file system with Filza File Manager on my iPad iOS 9.3.6 that is jailbroken. Ive found where power logs are logged as well as the power logs for the past few days ...
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2answers
247 views

How to move app bundles safely on the command line

I need to copy/move a bunch of macOS apps from some directory locations to another location. I know I can do this safely via the Finder. (By "safely" I mean that the app still starts up and works ...
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2k views

File duplication takes no disk space!

I have a question that's probably not asked too often, because it has little negative impact on the user. I can't find it on The Google anyway. So this question is for the edification of the curious-...
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1answer
106 views

apfs snapshot changing after creation?

I probably just don't understand how APFS snapshots work, but this seems odd to me: ~ $ mkdir /private/tmp/snap ~ $ pwd /Users/dmd ~ $ ls foo ls: foo: No such file or directory ~ $ tmutil ...
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120 views

Error trying to install fuse-ext2 with Homebrew

I have installed Homebrew and Xcode already (macOS 10.15.3). I am trying to install fuse-ext2 to have access to my ext4 disks. Thought I am close to achieve it by following this from https://libraries....
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100 views

RAM disks - can I use APFS and/or compression?

I use a 200MB Ram disk to write some throwaway files that I use repeatedly but can forget from run to run and don't mind losing on a shutdown. I often run out of space however and have to clean house....
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How can I import an iTunes library from XML while preserving the “date added” field?

I have an iTunes Music Library.xml file and an iTunes Media directory. The "date added" fields in the XML file are correct. The "date created" file attributes are correct. However, when importing into ...
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28 views

Fixing aliases for hidden files

Had to migrate to a new Mac and all of the aliases I have for hidden files are broken. When I try to navigate to the original file when I click "fix alias", I can't see the file in question in the ...
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1answer
359 views

Why would native Mac filesystem performance be MUCH worse than various virtualized disks on the same mac? [closed]

I was attempting to profile a php application when I noticed it was running MUCH slower on my mac vs docker vs virtualbox (all on the same hardware). I started narrowing down possible issues, but now ...
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1answer
70 views

Why does macOS not assign unique identifiers to files?

I want to preface this question by disclosing I know next to nothing about computer architecture, storage and operating systems. For a personal project, I'm trying to make a roadmap for how to make a ...

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