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- Jun 22, 2011 Hard-drive permissions can be set in the Sharing & Permissions section of the Finder's information window. Note that within this directory the boot drive is.
- I went to install the OS again and when I select the drive and hit 'install' I get 'The operation couldn't be completed. Permission Denied' When I search for this problem it looks like most people aren't reinstalling the OS and just installing a program so their issue seems to.
- Dec 10, 2017 Hi, I've just got a new Mac with High Sierra and have installed MC 8.9.4 on it. But I'm not able to change the permissions on the Mac HD to allow MC to use it a a Media Drive - I get 'The operation can't be completed because you don't have the necessary permission', even though I'm an Admin user.
Mar 07, 2018 Files can have a range of permissions indicating which users can read, write and execute the file, as well as other more nuanced options. While this might seem unnecessary for an individual user’s laptop system, it’s actually a critical part of the operating system’s functionality. Even today permissions are an important part of the macOS.
By Katrina | Posted to NTFS for Mac, updated on May 25th, 2020 |
External hard drives are important storage media for both Mac and Windows users. Usually, you can read and write to files on an external hard drive on your Mac. But there are chances that this external hard drive shows read-only on Mac. For example, many people have reported that their WD My Passport external hard drives are read-only on Mac. When you check its disk information, you will find you can only read the external hard drive on Mac. Moreover, users who use USB flash drives and SD cards on Mac also encounter this read-only problem.
You may be wondering why you can't write to this external hard drive even though you are the owner of this disk, and more importantly, if you can fix this read-only problem without formatting or not?
Thus, this post will analyze three external hard drive read-only cases so that you can find a relevant and feasible solution to your problem.
- Table of contents
- Case 1: The read-only external hard drive is NTFS file system
- Case 2: Disk permissions are changed as read-only
- Case 3: Can't write to external hard drives on Mac due to disk errors
- Bonus part: Fix SD card read-only on Mac
Case 1: The read-only external hard drive is NTFS file system
A file system controls how data is stored and retrieved on a disk. There are many different kinds of file systems, and each one has different structure and logic, properties of speed, flexibility, security, size, etc. By default, Windows uses Microsoft NTFS file system while Macs use HFS+ and APFS for OS volume. FAT32 and exFAT are usable for both Windows and Mac operating systems.
That's to say, you are unable to write to NTFS drives on macOS Catalina, Mojave, and any earlier Mac operating systems . If you try to copy or drag files on an NTFS-formatted external hard drive on Mac, you'll be unable to but see the greyed-out no symbol as below. And when you open files on this external hard drive, you will find your documents being read-only. For an NTFS file system SD card on Mac, files like photos are locked as you can only read them.
Therefore, if you find your external hard drive read-only, for example, a Seagate external hard drive shows read-only on Mac, the first thing that comes to your mind should be to check if this drive is NTFS file system.
How to check if an external hard drive is NTFS file system on Mac?
Simply, you can check this by viewing its disk information either in Disk Utility or in the Finder, and here is how.
Method 1: Check if an external hard drive is NTFS file system in Disk Utility
Step 1: Click on Launchpad at the dock of your Mac and choose Other in the menu.
Step 2: Choose Disk Utility among these utilities and open it.
Step 3: When it is launched, click on the external hard drive you have problem with in the left sidebar. You will see an obvious 'Windows NT File System' in the right column.
Method 2: Check if an external hard drive is NTFS file system in the Finder
You can also check this in the Finder with a few clicks.
Step 1: Open the Finder and right-click on this external hard drive.
Step 2: Choose Get info in the context menu.
Step 3: You will see 'Windows NT File System (NTFS)s' after File system if the read-only drive is formatted with Microsoft NTFS file system.
Then, after making sure that it is the Windows NTFS file system that makes your external hard drive read-only on Mac, you can go head to fix this problem. Try to repair the read-only external hard drive with or without formatting.
Solution 1: Format this external hard drive to exFAT/FAT32
It is possible that you just recently bought a new hard drive and found it is formatted as NTFS. In this case, if you don't have anything important on this drive or you have a copy of a data backup, you can simply format this external hard drive without worrying about data loss. To formatting this read-only hard drive, you can just go to Disk Utility and Erase it.
There are several formats you can choose, and erasing this disk into which file system depends on how you intend to use the drive.
Nvidia GPUs receive driver updates soon after each version update of OS X. Only one driver is released by Nvidia and it includes support for all of their modern GPUs. You will not find individually named Nvidia drivers for OS X, they are all titled 'Quadro & Geforce Mac OS X Driver Release xxx.xx.xxxxx'. The following list includes links to. Graphics driver updated for macOS Sierra 10.12 (16A323) Contains performance improvements and bug fixes for a wide range of applications. Includes NVIDIA Driver Manager preference pane. Includes BETA support for iMac and MacBook Pro systems with NVIDIA graphics; Release Notes Archive: This driver update is for Mac Pro 5,1 (2010) users. Mac OS X Support Mac Software Other Apple Hardware Laptops Laptop Compatibility Catalina Laptop Support. NVIDIA Drivers Note: This. MacOS 10.12.2 Sierra (16C67) 61832667 367.15.10.15f03 macOS 10.12.1 Sierra (16B2659) 61836760 367.15.10.15f03. CUDA driver which supports macOS Sierra 10.12.2 will be available at a later date. New in Release 367.15.10.25f01: Graphics driver updated for macOS Sierra 10.12.2 (16C67) Contains performance improvements and bug fixes for a wide range of applications. Includes NVIDIA Driver. Nvidia web driver 10.12.6.
- APFS: If you plan to use the drive on macOS 10.15 Catalina, macOS 10.14 Mojave, and macOS 10.13 High Sierra, you can format it into APFS for better experience.
- HFS+: It is also known as Mac OS Extended, whose later versions added journaling to prevent corruption of the file system structure. Therefore, you can choose HFS+ if you are going to use this external hard drive on macOS Sierra and earlier Mac operating systems.
- FAT32/exFAT: If your storage device is an SD card or USB flash drive, and you'd like to read-write this portable drive both on Mac and Windows OS, you'd better erase it with exFAT or FAT32.
Solution 2: Run NTFS for Mac software on Mac
However, if you have several important files on this external hard drive, and you frequently swap your work between Windows and Mac computers, formatting this drive definitely is the last solution you would resort to. The reason is, as you may know, formatting a hard disk will wipe your data out of this drive and cause data loss.
Then when external drive is NTFS-formatted, how can you fix the read-only drive without formatting?
An NTFS driver for Mac should be the most convenient tool for people who want to fix this issue without formatting, because you can work natively and seamlessly on NTFS file system external hard drives on your Mac in a few clicks. The NTFS for Mac software you can try is iBoysoft NTFS for Mac to make the NTFS drives writable on Mac.
About iBoysoft NTFS for Mac
iBoysoft NTFS for Mac can mount NTFS external hard drives in read-write mode on your Mac, granting people full access to read, write, edit, copy, and delete files on NTFS-formatted drives.
iBoysoft NTFS for Mac- Best NTFS Disk Management for Mac
- Grant full access to read, write, edit, copy, move, transfer, and delete files on NTFS file system external hard drives, SD cards, USB flash drives, etc. on Mac
- Erase disks to NTFS file system on Mac
- Unmount multiple drives with one click
- Support macOS 10.15/10.14/10.13/10.12 and OS X 10.11/10.10/10.9/10.8
iBoysoft NTFS for Mac is also a wonderful tool to manage NTFS external drives on Mac. It's a menu bar app, from which users can mount, repair, erase NTFS hard drives, external hard drives, SD cards, USB flash drives, etc. with a simple click.
Tutorial to write to NTFS-formatted external hard drive on Mac with iBoysoft NTFS for Mac
Step 1: Free download, install and launch iBoysoft NTFS for Mac on your computers.
Step 2: Connect NTFS external hard drive to Mac.
Step 3: Write to NTFS external hard drive after the external hard drive is mounted successfully.
Solution 3: Fix read-only NTFS external hard drives with the command line (not recommend)
You can also try the experimental method to enable NTFS read-write support with command prompt on your Mac. However, it is not recommended as it is not stable and could result in data loss if it goes wrong. So, use the command line with caution!
Warning: Do not use this method as a long-term solution to write to NTFS drives that contain important files. Meanwhile, do not use this method if you are not familiar with the command line, in case that you input a wrong command and cause unexpected damage to your Mac and drives.
Well, if you insist…here is how to do this:
Step 1: Click Go at the upper right of your desktop and go to the Applications > Utilities > Terminal.
Step 2: Input 'sudo nano /etc/fstab' to edit the fstab file (supply your password when prompted).
Step 3: Type 'LABEL=NAME none ntfs rw,auto,nobrowse' in the editor window for the fstab file. (Be sure to change the word NAME to the name of your drive)
Step 4: Press Control + O to save the file, followed byControl + X to exit.
Audio driver mac os x download. Step 5: Unmount your NTFS drive and attach it again.
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Case 2: Disk permissions are changed as read-only
The Sharing and Permissions option is set up to determine who can delete or modify a file or program copied to the drive. Thus, if the permissions are changed by you or others, a message will pop up and inform you that the file is read-only or you don't have permission to save when you save changes to this disk.
In this case, if you right-click on the icon of your disk and choose 'Get info' to check the disk information, you will find you can only read this external hard drive or SD card even though it is not NTFS file system. That's to say, you can't write to this drive.
If this is the cause for your external hard drive being read-only, you can try the following solutions and fix this issue without formatting your drive.
Solution 1: Change the permission of this external hard drive
If your files on this external hard drive show as read-only or locked, or if you try to move some files to the Trash but get no response, you can try to change the permission of this disk.
Step 1: Open the Finder and find your external hard drive in the left sidebar.
Step 2: Right-click on this drive or volume and choose Get info, and then scroll down to Sharing & Permissions.
Step 3: Extend this column by clicking on the triangle symbol, and then click on the Lock icon.
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Step 4: Input the password of your Mac, and click on Read only, then change your privilege as Read & Write in the right column.
Step 5: Click the gear button (Action menu) at the bottom of the window, choose Apply to enclosed items, and then click OK to confirm the action.
Solution 2: Ignore Permissions on external hard drive in the Finder
To prevent such errors from happening, Mac operating system includes a setting to ignore Permissions on external drives, so all files on the drive should be fully accessible regardless of their Permissions settings. Here below are steps to ignore the permission on external hard drives:
Step 1: Select the external hard drive on your desktop or in the Finder sidebar, and then press Command + I to get information on the drive.
Step 2: Click on the arrow that is on the left side of the Sharing & Permissions tab near the bottom of the window.
Step 3: Check the box to Ignore ownership on this volume, or toggle it off and then on if it's already enabled. (Provide the password of your Mac if it is required.)
Case 3: Can't write to external hard drives on Mac due to disk errors
Some internal errors will cause a drive to be read-only as well. When this happens, your drive will be only mounted in read-only mode to prevent the data on it from corruption.
Solution: Repair read-only external hard drive with Disk Utility
Fortunately, you can take some actions to repair these minor disk errors with Disk Utility on your Mac. You can use the following guide to fix read-only external hard drive in Disk Utility without formatting.
Step 1: Click Go at the upper right of your desktop and go to Utilities, and then open Disk Utility.
Step 2: Select the read-only external hard drive on the left window.
Step 3: Click First Aid in the and choose Run.
However, it is possible that an NTFS format is not the culprit of your disk being read-only. On the contrary, some other reasons make your disk not writable. For instance, if your disk becomes read-only after a macOS update, you may be facing one of the rare glitches of a macOS. Under this circumstance, if the solutions above are unable to fix this read-only external hard drive, you may need to format this drive, and then recover your important data from the formatted external hard drive instead.
Bonus part: Fix SD card read-only on Mac
Except for external hard drives, memory cards like micro SD cards and SDHC cards could be read-only on Mac as well. It could occur whether you access the SD card via a card slot or connect the camera to the Mac. If you have tried the solutions mentioned above and none of them work for you, here is a bonus tip.
Solution 1: For most cases, you need to make sure that you slide the write protection switch to the unlocked positition. It's possible that some USB SD card adapters don't honor that switch, but the card reader on Mac definitely does.
Solution 2: If the SD card is read-only on Mac still, you may want to slide the read-write lock to the middle neutral position and retry. Strange though, sliding the 'lock' switch on the card halfway does help mount SD cards in read-write mode.
Conclusion
Generally speaking, external hard drives being read-only on Mac appears when they are not formatted correctly and the solutions above should be helpful. Nevertheless, if you failed to repair this hard disk even with Disk Utility, it could be a failed external hard drive which needs to be replaced, or you can try your luck by sending it to a local disk repair service.
What are disk permissions and why do they need repairing?
Disk permissions on macOS are used to keep your files secure. They’re designed so that certain programs (or other users if you share your Mac) can’t just dip into a system file they have no business with and modify it. They’d need permission to do that.
Every file and folder on your Mac comes with an associated set of permissions. From the Apple Community:
“Many things you install in Mac OS X are installed from package files (whose filename extension is '.pkg'). Each time something is installed from a package file, a 'Bill of Materials' file (whose filename extension is '.bom') is stored in the package's receipt file, which is kept in /Library/Receipts/ in Mac OS X v10.5 and earlier. These files don't take up much disk space and you shouldn't put them in the Trash. Each of those '.bom' files contains a list of the files installed by that package, and the proper permissions for each file.”
Unfortunately, these permissions can easily become messed up unintentionally. It’s quite common for this to happen when installing and uninstalling apps on your system. And when it does, apps can find themselves with free reign to alter files and modify read-only files which can cause all kinds of permission errors and system issues such as lagging, freezing, or crashing.
If you notice anything out of the norm regarding system performance, the first thing you should do is troubleshoot those disk permissions.
Below we’ll show you two ways: the manual and the easy one. Choose the way that works best for you.
How to repair permissions on Mac: The manual way
If you’re running an older version of macOS, Disk Utility is the go-to tool for troubleshooting problems.
Why an older version?
Because as of macOS version 10.11 El Capitan, Disk Utility no longer comes with the option 'repair disk permissions'. Boooo!
Apple even removed the command line:
But there’s a method to the madness. macOS now comes with a feature called System Integrity Performance (SIP) which is designed to automatically repair file permissions during software updates and system changes. SIP works by restricting the root account so that it can’t do things like modify protected locations and processes such as /System and /usr. This should prevent malware from gaining root permissions and infecting your system files.
Anyway, back to using Disk Utility to repair disk permissions. If you’re running a pre-El Capitan version of macOS, follow these steps:
1. Press Command + Space to open Spotlight, type in “Disk Utility”, and hit Enter.
2. Select Macintosh HD from the left sidebar menu.
3. Click on the First Aid tab.
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4. Click on Verify Disk Permissions. By taking this step, Disk Utility will work through your hard drive to detect broken or misbehaving permissions and list them for repair. This might take a few minutes but you can check the Show details box to keep an eye on its progress.
5. Click on Repair Disk Permissions and wait while Disk Utility runs through the identified permissions to fix them.
If disk permission issues have played such havoc that your Mac won’t boot correctly, it’s possible to access Disk Utility in Recovery Mode. Do this by holding Command + R during bootup.
If you’re installing a newer (or older) version of macOS on top of your existing operating system, Mac will perform a disk permission repair as a part of the installation so that you start from a clean slate.
How to repair disk permissions on Mac: The easy way
For users of macOS versions El Capitan and newer, the removal of Repair Disk Permissions means you have no troubleshooting solution to turn to in if your Mac is ailing.
But worry not, CleanMyMac X is the hero you need.
CleanMyMac is like Disk Utility in that it does all of the heavy lifting for you to verify permissions and repair your Mac’s disk.
Even System Integrity Performance running quietly in the background doesn’t prevent certain issues from arising. If you’re suffering from any of the following problems, boot up CleanMyMac and have it take care of business:
- Improper functioning of applications.
- Inability to move or delete files.
- Inability to access files.
If you Mac appears to be running fine, it’s still worth running repairs every so often to ensure it stays that way. Not all broken permissions affect performance but that doesn’t mean they shouldn’t be fixed.
Repairing Disk Permissions in a few clicks
First things first, you’ll need to download CleanMyMac X. You can do that here. It’s free so you won’t need your credit card. Once that’s done, follow these five steps:
1. Launch CleanMyMac.
2. Click on Maintenance from the left sidebar menu.
3. Check the box next to Repair Disk Permissions.
4. Click Run.
CleanMyMac will scan your system to verify disk permissions and automatically repair permissions that are found to be faulty. When the task is complete, you’ll be able to view a log of all the permissions that were repaired.
And that’s all there is to it. Your Mac should now be running as intended.
External hard drive repair mac os x. It should only take a minute or two for the drive to be erased and reformatted. Now your drive is ready for OS X. Install OS X. There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X.
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Disk permissions are critical to your system’s security and performance but only when they’re working as they should. Use CleanMyMac to verify and repair disk permissions whenever you run into issues with apps or files for a healthy running Mac.
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Enjoy a clean, happy Mac!