External hard drive shows read-only after Mojave update, how to fix?

Posted by Katrina to NTFS for Mac on July 10th, 2018

The new released macOS Mojave 10.14 has many easy-to-use features, for most part. But sometimes, things happen that can really turn you into trouble. One of things is when you upgrade to macOS Mojave, your external hard drive shows read-only. This problem is caused by various reasons, so here we will analyze some common causes and offer three feasible solutions.

1. External hard drive is formatted to NTFS.

In most cases, this happens if you are switching the external hard drive between Mac and Windows. It is because the external hard drive is formatted to NTFS for Windows. By default, macOS Mojave only enables NTFS read support, but disables NTFS write support. You check the information in Disk Utility.

Solution: Install NTFS for macOS Mojave

iBoysoft Drive Manager is a capable NTFS for Mac program in the market to enable you easily to read, write, edit, delete, copy files from NTFS drive on macOS Mojave 10.14.

Besides, iBoysoft Drive Manager is good at managing external drive and network drive on macOS Mojave 10.14/High Sierra 10.13/Sierra 10.12/10.11/10.10/10.9/10.8/10.7. It enables you mount/unmount external drive, including external hard drive, USB flash drive, SD card, memory card, pen drive, digital camera, etc. iBoysoft Drive Manager also allows you to map network drive as a local one. Once an external drive/network drive is connected, you are able to take control of them from the menu bar, such as editing, copying, deleting any of them.

iBoysoft Drive Manager

This tool is so easy to use when you have many external drives and network drives to manage. You can mount/unmount all external drives or network drives with only one click. Moreover, iBoysoft Drive Manager is so smart that it automatically reconnect network drives after resuming from sleep, and eject all external drives safely when the system's going to sleep. If you are worried about data loss due to unsafe ejection, iBoysoft Drive Manager is suitable for you.

Tutorial to write to NTFS external hard drive on macOS Mojave with iBoysoft Drive Manager

Step 1: Download and install iBoysoft Drive Manager on Mojave.

Step 2: Launch iBoysoft Drive Manager and connect the NTFS external hard drive to Mac.

Write to NTFS Seagate external hard drive on macOS Mojave

Step 3: Write to NTFS external hard drive after getting notified that the drive is mounted successfully.

2. Access permission not ignore

In order to protect files for multiple users, macOS has set access permission for all files, folders as well as external drives on the system. If the access permission is set up, it will prevent access to the files on the disk or to the disk itself.

Solution: Ignore permissions on external drives in Finder

There is a setting to ignore permissions on external drives on macOS. To fix read-only external hard drive on Mojave, you can simply find the option and the external drive will be fully accessible.

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 at 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.

3. Check errors on the external hard drive

Some minor formatting errors will lead to read-only external hard drive. When these errors occur, to prevent further data corruption, the operating system will mount it in a read-only state.

Solution 1: Repair the external hard drive via First Aid

Step 1: Open Disk Utility.

Step 2: Select the read-only external hard drive on the left window.

Step 3: Click First Aid in the top center and choose Run.

Solution 2: Reformat the external hard drive

If Disk Utility fails to fix the read-only external hard drive, we should consider wiping the drive and repartitioning it. But if you have important data on the external hard drive, you'd better recover lost data on macOS Mojave with iBoysoft Mac Data Recovery.

Still have questions?