Updates & Downloads

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T 5, TT 15 OnSemi software version 6.10

as of November 3, 2025

Use WebUpdater to install this file.

(997 KB)

View system requirements

Notes:

• Attention macOS users: This product IS NOT compatible with your OS. Please use the Windows version of WebUpdater to perform updates.
• WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
• If attempts to upload software fail, you may need to return the device to Garmin® for service.

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Change History

Changes made from version 6.00 to 6.10:

• Fix tracking and training

Changes made from version 5.80 to 6.00:

• Bug fixes and improvements

Changes made from version 5.40 to 5.80:

• Add improvements to pairing

Changes made from version 4.50 to 5.40:

• Fix Rescue Mode not exiting when rate changes

System requirements

1. IBM-compatible PC running Windows 7 SP1 or later operating system and an available USB port.

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