How to open .JPGM files on Mac
To open .JPGM files on Mac, try opening the file with an application you have that explicitly supports JPEG 2000/JPM (image/jpm).
Step-by-step instructions
- Try opening the file with an application you have that explicitly supports JPEG 2000/JPM (image/jpm).
- Control-click the file → Open With → select that JPEG 2000-capable app.
- If you can’t find compatible software on macOS, transfer the file to a Linux/desktop setup with JPEG 2000 support and convert it to a more common format.
Common issues
The file won’t open in Photos/Preview or the default viewer
.JPGM (image/jpm) is not commonly supported by built-in photo apps, even when those apps can open more common JPEG/JPG files.
- Use software that explicitly supports JPEG 2000 compound images (JPM/image/jpm), not just standard JPEG.
- If you can open it on a desktop with JPEG 2000 support, convert it to a more widely supported format for easier viewing on other devices.
Linux recognizes the file type but no app launches
shared-mime-info can identify *.jpgm, but MIME recognition does not mean a decoder/viewer is installed.
- Install a JPEG 2000-capable viewer/decoder on your Linux system and retry via Open With.
- If needed, convert the file using a JPEG 2000-capable tool to a more common image format.
The file opens but looks corrupted or shows decoding errors
JPEG 2000 family files can be sensitive to incomplete downloads or partial transfers, and some tools have limited support for less common family members like JPM.
- Re-download or re-copy the file to ensure it is complete (compare file size with the source if possible).
- Try a different JPEG 2000-capable application; support for JPM/image/jpm can vary between tools.
Still can’t open your .JPGM file?
Recover a deleted or lost .JPGM file
If the file was deleted by mistake or the drive was formatted, data recovery software may be able to get it back. Stop writing to that drive right away, because new data can overwrite what you want to recover.
Windows software that recovers deleted or lost files from PCs and external drives such as HDDs, SSDs, USB drives and memory cards, after deletion, formatting or a crash.
Wondershare RecoveritWindows and Mac software that recovers deleted or lost files from computers and external drives such as HDDs, SSDs, USB drives and SD cards.
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Security note
Treat .JPGM as a complex image format: while it’s not meant to carry macros like office documents, vulnerabilities in image decoders do occur, so prefer opening untrusted files in well-maintained software.