Extent: Mount ext4 Drives
Read & write Linux disks
Only for Mac
Free · In‑App Purchases
Mac
Plug in a Linux disk and it appears in the Finder. Reading ext2, ext3 and ext4 is free; writing ext4, kept safe by the journal as on Linux, is a one-time purchase.
Plug in a disk from Linux – a USB drive, the SD card from a Raspberry Pi, a disk from a server – and it appears in the Finder like any other. Extent reads ext2, ext3 and ext4 through the file system extensions built into macOS: no kernel extension, no lowered security settings, nothing to install beside the app.
READ – FREE
• ext4, ext3 and ext2 as current Linux distributions format them: Ubuntu, Debian, Fedora, Raspberry Pi OS
• Disks mount on their own when you plug them in, in the Finder and in every app
• A disk that left Linux without being ejected reads as Linux will see it once it has finished its journal
• Symbolic links, permissions, extended attributes, and huge folders – tested with 100,000 files in one
• Disk images too: open an .img file from the File menu, or drop it on Extent's window
WRITE – ONE-TIME PURCHASE
• Create, change, rename and delete files on ext4 disks with a journal – the way Linux formats a disk today
• Extent writes through the disk's journal, as Linux does: a disk pulled out while writing comes back consistent, and what was saved stays saved
• Writing stays off until you turn it on, disk by disk
• ext2, ext3 and ext4 features Extent doesn't write yet – such as the case-insensitive folders of a Steam Deck's SD card – stay read-only, and Extent tells you why
CAREFUL BY DESIGN
• A disk on which Linux recorded damage stays read-only until it's checked there
• Extent keeps running in the menu bar while a Linux disk is connected, and ejects the disks cleanly when you quit it
• If a disk can't be read, Extent says why and what to do next; Help › Copy Diagnostics gathers the details for a support request
• No sign-up, no tracking, no network access
Try it without a Linux disk: Help › Open Sample Disk.
Requires macOS 27. Turn Extent on once in System Settings › General › Login Items & Extensions › File System Extensions.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Buying and restoring writing, made sturdier:
• If the App Store doesn't answer, Extent now says so and asks again, instead of leaving Unlock greyed out
• Restore and Unlock are always within reach, even while the App Store is slow to reply
• Clearer messages when the App Store can't be reached, or needs you to sign in to it again
The developer, Michal Fanta, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Michal Fanta
- Size
- 1.1 MB
- Category
- Utilities
- Compatibility
Requires macOS 27.0 or later and a Mac with Apple M1 chip or later.
- Mac
Requires macOS 27.0 or later and a Mac with Apple M1 chip or later.
- Mac
- Languages
English and 8 more
- English, Czech, French, German, Italian, Japanese, Korean, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Writing to Linux Disks $3.99
- Copyright
- © Michal Fanta
