A filesystem developed by Apple Inc. to extend HFS. Also known as "Mac OS Extended" "HFS Extended."

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Got Error hfs: _DKIOCCSMAP error 30 is the drive toast?

Tonight suddenly I started getting errors that files couldn't be written. I rebooted into the Recovery Partition and ran First Aid. It said things were fine but also that it Shrank my File System and ...
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25 views

How can Disk Drill say it has recovered 2.4 TB of files when the HDD is only 2 TB?

I had a serious failure on a 2TB external HDD this week. Yosemite says the drive is "not readable by this computer." Oh well, it happens to all HDDs sooner or later. Even though the contents could ...
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38 views

El Capitan Installer consistently corrups HFS+ superblock

The standard, non-beta El Capitan installer corrupts the HFS+ superblock, and states that it cannot fix the hard drive and cannot continue with installation. (The repair tools won't fix the hard drive ...
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37 views

WD My Passport 0820 USB HFS+ data disk drive partition problem following accidental use of Recovery Assistant

I have edited this post in view of recent developments I have a 2 TB USB Disk used for all my data. I accidentally ran Lion Recovery Disk Assistant on it, instead of my Pen Drive, to make a bootable ...
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1answer
96 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? ...
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11 views

Can I backup Photos in an exFAT partition?

Searching this question on the web one can find many sources affirming it shouldn't be done and some saying it's okay. I wanted a technical explanation of the reasons Photos libraries shouldn't (or ...
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1answer
48 views

HDD corruption after power cutoff

Yesterday a breaker tripped in the same room as my Mac Pro 1,1 running Yosemite (Hacked boot.efi.) All other machines powered up but this one. Attempting to mount via Target Disk Mode timed out, so I ...
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48 views

Best file system for USB stick for backup purposes

I bought a 128GB stick to back up my MacBook Air (Time Machine). This way I don't need to re-format my external HDD I use for backing up files from my Windows machine. Since I won't be using the stick ...
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32 views

Undo/Recover a quick formatted JHFS+ HDD drive

I just have made the biggest mistake in my life, accidentally format ~2TB of my personal data. Here is information about the Disk : 2TB HDD Drive : GUID Partition Map : OS X Extended (Journaled) : ...
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100 views

HFS+ Partition of Mac OSX is not recognized in Windows 10 Bootcamp

I installed triple systems (Mac, Windows, Linux) on my Macbook Pro retina mid 2014 with rEFInd boot loader. Hfs+ partition used to be visible in Windows 8.1 Bootcamp. But after updating to Windows 10,...
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1answer
135 views

Can I remove BootCamp HFS+ driver

So, I have an iMac 27" Late 2012, and I have just installed Windows 10 Home 64Bit through BootCamp. BootCamp comes along with several "support software", useful drivers made for Windows and Apple ...
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1answer
69 views

Can I use the free space on an NTFS Hard Drive to make a “Mac OS Journaled” partition to use as a backup space?

I have a 1 TB NTFS HDD which has 350GB free space, how would I format that 350GB to use it as a backup space for my MacBook? diskutil list output: /dev/disk1 (external, physical): #: ...
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2answers
65 views

How Do I Create a Named Fork and Store Data In It?

It says here... https://en.wikipedia.org/wiki/Fork_(file_system)#Apple ...that the HFS+ file system in OSX supports "multiple named forks". How do I create a named fork at command line, and then how ...
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20 views

Browse HFS Journal

Is there any way to examine the contents of thee journal of an HFS mount? I'm super-curious. I'm ok with the command line, but GUIs are always nicer. X is fine. Also, will it be beneficial to create ...
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2answers
164 views

What filesystem should I use to share across Mac (Yosemite) and Linux?

I need to move large files (5-5Gb) from a Mac to a Linux machine. Network transfers are too slow, so I wanted to use USB drives. However filesystems seem to be a bit of a nightmare: HFS+ is hard to ...
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1answer
304 views

What is the max number of hard links in OS X (10.11)?

I have a file that I keep linking to. It's up to 45 links now. Does anyone know how I can find out what the maximum number of hard links is in OS X 10.11 (El Capitan)?
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1answer
306 views

How to force a readonly volume to remount as read-write?

I have an external Firewire volume with some filesystem problems. One problem is that Disk Warrior can't fix these errors because there is not enough space left on this volume (in fact, it is ...
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102 views

How To Perform External USB Disk Clone

This question is similar to this one: Partitioning Software I have two WD 2TB external USB disks. The first is formatted for use as a backup disk for a Windows 7 netbook. Mac OS Disk Utility does ...
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1answer
131 views

Not able to open a Mac OS Extended (Journaled) SSD disk in Boot Camp

I have installed the full version of Paragon's HFS+. I am fully able to read/write files from the partition that boots OS X, but not an external SSD with the same format. I get the "pling" sound when ...
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76 views

Can I change the filesystem of a drive from ext4 to hfs+ without formatting?

So my one drive is ext4 formatted but I would like to read and write to it from OS X 10.9 The only thing I can do is use osxfuse 2.8.2 to make the drive read only at the moment.
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1answer
66 views

Time Machine offers to erase disk data (format), will it delete all my partitions?

So, I'm trying to perform my Macbook backup on my 3TB drive. This drive is currently has a GPT table with 4 partitions: BackupMain BackupKubuntu BackupWindows BackupMac Before BackupMain, there ...
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2answers
290 views

Mounting HFS+ volume in Linux

I'm not sure if this is the appropriate area to post my question. But I am wondering how can I mount a MacBook Pro mid 2007 HDD on Debian Linux. My MacBook bombed out on me and now I need to attempt ...
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82 views

OS X won't start after converting Core Storage to HFS+

I followed this guide to convert my Core Storage partition to HFS+ in order to make my OS X partition visible in Windows 10. Now I can see the Mac partition in Windows but I can't start my computer ...
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1answer
3k views

Read-only HFS+ on Windows 10 with boot camp driver question

I've been searching around on the internet for a while trying to answer this question, but I can't get a clear answer for it. Background info: I'm running El Capitan with a Windows 10 partition on my ...
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28 views

How to add addional HFS+ partitions after installing Windows with Bootcamp

The goal is to create a few extra HFS+ partitions after running the Bootcamp utility while not breaking Bootcamp's boot-ability. I am Running OS X El Capitain, and I only have a single disk drive to ...
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1answer
918 views

How to mount Core Storage volume under Linux (or force conversion on unrevertible volume)?

I tried to mount HFS+ partition in Linux today, but I had problem with hfsplus: unable to find HFS+ superblock I've found later that this partition is in fact Core Storage container for the logical ...
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1answer
106 views

USB Hard Drive HFS+ Encrypted Partition Formatted / Recovery

I have a WD 1TB USB External Hard Drive that was accidentally formatted. I had formatted the disk and started writing an ISO to the disk (less than 5 seconds), when I realized it was to the wrong one. ...
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1answer
113 views

How to save data from a time machine backup that has gone bad

My 3TB USB disk I use as my Time Machine target has gone bad. I can mount it read only but no set of options I've tried allow me to mount it read/write. The fsck tells me that the catalog btree is ...
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2answers
821 views

Rebuild partition table on external HDD - not writable

I have an external hard drive formatted with 3 HFS+ partitions. To cut a long story short I had it connected to a Windows PC and accidentally started formatting the drive to NTFS. As soon as I ...
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1answer
101 views

Decipher diskutil error code

Checking catalog hierarchy The volume could not be verified completely Volume repair complete Updating boot support partitions for the volume as required Error: -69845: File system verify or repair ...
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105 views

Move the beginning of HFS+ partition

What I'm trying to do is move the beginning of the partition on an external HD drive. I have an external HD drive with two HFS+ partitions on it. I want to grow the first one at expense of the second ...
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20 views

Why can I not make a hard link to PkgInfo?

With bash as my shell, a simple way to demonstrate my question is this: mkdir -p foo.app/Contents cd foo.app/Contents echo -n 'AEgxFXTC' > PkgInfo ln PkgInfo f The ln will fail with ln: f: ...
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276 views

HFS+ external drive missing EFI, will not mount on Mac

First off: Fear not, I have everything from this drive backed up. I'm just trying to reformat it, but I had someone else attempt it on Windows which doesn't look like it helped. I'm a novice but ...
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1answer
152 views

Can files be exchanged between FAT32 and HFS+ partitioned drive?

I just got a LaCie 1TB external hard drive and I have a MacBook Air with OS X 10.8. I often exchange movie and music files with friends that have PCs. If I were to partition my drive to have 250 ...
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30 views

How do I transparently compress a directory?

I'd like to enable HFS+ compression for a directory, applying it to both the existing files in that directory and newly copied files. I expect to be able to read and write the contents of that ...
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2answers
1k views

OS X Case-sensitive issues?

It's been a few years since I tried a case-sensitive install of OS X and I'm wondering how it is these days? I had to revert to case-insensitivity before due to Adobe CS but I think that's fixed now. ...
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541 views

Is it safe to convert Core Storage partition to HFS+?

I just got my new Macbook Pro, I tried to make two new partitions using Disk Utility but I could only create one. After googling I found out that I can't create more than one additional partition in ...
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238 views

Unable to recover files using The Sleuth Kit's tools on Mac OSX Mavericks

So I'm trying to learn The Sleuth Kit on different operating systems and file systems. I've previously successfully recovered files from NTFS (Win7) using TSK's tools. Now I'm trying the same on HFS+ ...
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528 views

What file systems can work with OS X File Tags? (HFS+, ExFAT, NTFS, etc.)

What file systems can work with OS X File Tags? (HFS+, ExFAT, NTFS, etc.) I have an NTFS data drive in a Windows machine that I might move to an external hard drive enclosure, if I can use Tags with ...
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1answer
24 views

Do files lose their UTI when copied to another file system?

From what I understand, if you create a file on OS X it will have a Uniform Type Identifier. I'm not sure if it's part of the file system or the file itself. If you copy the file to another file ...
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1answer
743 views

Failed to mount partition of Mac OS Extended (HFS+)

As a matter of fact, my 1 TB External hard disk has three partition: "MAC OS", "NTFS" and "FAT32". All of the partitions worked very well in the past. However, I just discovered that my Mac OS ...
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3answers
2k views

Recover corrupted Mac HFS+ drive (image) under Linux

I'm trying to recover an apparently corrupted disk. It appears that through improper shutdown the drive has been somehow killed. It's the main partition of a Macbook Pro. I've used dd to copy the ...
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1answer
7k views

Verify disk reports error, recovery os repair + fsck says disk is fine

After my time machine backups got stuck to finish at some point, I decided to do a disk check using disk util. I'm getting the following output while running "verify disk": The volume 86A26AC7-...
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1answer
642 views

Dropbox Install in Data Partition between OS X and Windows 7 Boot Camp

I have a Data partition between OS X Mavericks and Windows 7 Boot Camp. I have my Dropbox folder in the partition. I have tried using it in the past formatted as exFAT. This was unsatisfactory in that ...
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70 views

Optimize filesystem for speed over integrity

On Linux, I use the noatime,nodiratime,nobarrier,data=writeback mount optioins in /etc/fstab to trade filesystem safety/consistency/integrity for speed which makes sense for local development. Is ...
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328 views

Will HFS+ extended attributes be lost on FreeNAS?

I have FreeNAS server partially set up on an HP Microserver, but just realized that I may lose all my extended attribute metadata on the files that come from my Macs (which is what most of my ...
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2answers
271 views

How to get file metadata?

How to get extensive filesystem information about a file? I have a file that consistently causes errors in my backup utility (Unison). I'm trying to narrow down a bug and find out how it is different ...
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97 views

How to run OS X on ext4?

I'd like to install OS X on an ext4 filesystem, not hfs. How can this be done? I've looked at the Apple site, but, of course, it won't say anything about that.
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1answer
608 views

Why is a hard drive not readable anymore after removing it from the Mac?

I have a mid 2010 27" iMac. Until this evening it had an SSD (primary drive with OS X Mavericks installation on it) and a HDD as second drive. The HDD is a Western Digital I built into the iMac in ...
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1answer
60 views

How can I put my image of a drive onto a new partition on a Mac? [closed]

My friend has a Mac which suffered some sort of hard drive failure. I'm not sure if it is a hardware failure, the filesystem is corrupted, or both. We tried 'repair' in Disk Utility and it said it ...