How to open .SOS files on Mac
To open .SOS files on Mac, use a GIS application that supports SOSI (for example, Global Mapper) and open/import the .sos file from within the app.
Step-by-step instructions
- Use a GIS application that supports SOSI (for example, Global Mapper) and open/import the .sos file from within the app.
- If double-clicking doesn’t work, open the GIS app first, then use its Import/Open command and select the .sos file.
Common issues
Windows/macOS says it can’t open the .sos file
This usually happens because SOSI is a specialized GIS interchange format and general-purpose apps don’t support it.
- Install or use SOSI-capable GIS software (for example, Global Mapper) and open/import the file from inside the application.
- If you are using Trimble Quadri, follow its SOSI import workflow rather than double-clicking the file.
The file imports but appears empty or incomplete
The dataset may not contain the layers/objects you expect, or the import settings may not match the data content.
- Re-import and review import options in your GIS tool (for example, layer selection or feature filters, if available).
- Ask the sender what the dataset should contain and whether additional companion files or a different export was intended.
MIME type/association problems on Linux desktops
Your system may not recognize the file extension or may not have a MIME association for SOSI, so the file manager can’t suggest the right app.
- Check whether your system recognizes the common SOSI MIME type (text/vnd.sosi) and add/adjust associations as needed per the shared-mime-info approach used by Linux desktops.
- Open the file from within your GIS application using its Import/Open command even if the file manager doesn’t associate it.
You expected a “document” but received a geospatial data file
.sos is often misunderstood as a generic document type, but it commonly refers to SOSI geospatial exchange data.
- Confirm with the sender that the file is SOSI geospatial data and ask what software/workflow they intended.
- Use a GIS tool that explicitly supports SOSI (for example, Trimble Quadri or Global Mapper).
Still can’t open your .SOS file?
Recover a deleted or lost .SOS 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
.sos (SOSI) files are data files, not executables, but they are still parsed by complex GIS software—only open them in trusted, up-to-date GIS applications to reduce parser-related risk.