Updates & Downloads

Forerunner 945 software version 3.77 Beta

as of December 4, 2019

For any issues that you encounter please fill out the form included in the download and attach it to an email to [email protected] Please note that you may not get a response to the email unless we need more information on the issue you report.
Although this software is believed to be reliable, it has not yet been released for production and should be used at your own risk.

Add Garmin Swim 2 Features: Advanced Swim Workouts, Auto rest, Critical Swim Speed, Swim Pacing Alerts
Added all-day respiration, respiration widget, and breathwork activity
Improved treadmill calibration
Added Pilates
Improvements to audio playback, audio apps
Fixed crash that could occur on activity save at high elevation
Fixed issue where sometimes heart rate and PulseOx data would not show when all-day PulseOx was enabled
Various other fixes and improvements

Added test code to track down issue with save at high altitude. Please see readme for beta.
Improvements to segment achievements
Improve stress readings
Improvements to media player
Improvements to phone connectivity
Fix blocky elevation issue
Improvements/fixes for Spotify
Fix potential device freeze on activity summary loop.
Improvements to headphone connectivity
Improvements to sensor connectivity
Fix backlight gesture bug introduced in 3.46 beta
Various other fixes and improvements

Added PacePro feature.
Added additional data field configurations (5 and 6 field).
Added graphical gauge data fields (i.e. Heart Rate, Cadence, etc.)
Improve ANT+ and BLE sensor management
Bluetooth software update to address battery life issues that could occur on some devices
Improvements to headphone pairing and media player
Improvements to golf
Improvement/fixes for Connect IQ
Some improvements for segments/Strava segments
Various other fixes/improvements

Added ability to enable wrist-based heart rate for swimming (pool and open water). This feature is enabled by default. To enable/disable this feature: 1. Open Menu 2. Scroll to 'Wrist Heart Rate' and enter menu 3. Scroll to 'While Swimming' and toggle to 'On'
Fix swimming cadence/stroke rate
Improvements to PulseOx settings
Various fixes for ConnectIQ

Added ability to enable wrist-based heart rate for swimming (pool and open water). To enable this feature: 1. Open Menu 2. Scroll to 'Wrist Heart Rate' and enter menu 3. Scroll to 'While Swimming' and toggle to 'On'
Added Connect IQ 3.1 functionality.
Fixed issues with LiveTrack
Addressed rare issue of hourly alert drifting off of hour
Fixed lapping issues in adaptive training plans and workouts
Addressed 'Around Me' search time when using North Up map
Fixed issue of duplicates of a user in GroupTrack
Enabled support for Approach CT10 golf club trackers
Added Sight N' Go feature

Fixed bug that would slowly fill temp folder with unnecessary files
Enable phone position injection to improve GPS fix times after moving long distances
After Sunset added for backlight gesture option
Added option to disable/enable lap key for activities
Various golf improvements
Added contextual menu accessible from activity paused screen
Various other improvements

Connect your Forerunner 945 to your computer using the USB cable.
Download and unzip Forerunner945_377Beta.zip. Place the GUPDATE.GCD file in the \GARMIN folder of your device's internal storage drive.
In Forerunner945_377Beta, go to the RemoteSW folder. Place the GUP3114.GCD and GUP3303.GCD file in the \GARMIN\REMOTESW folder of your device's internal storage drive.
Disconnect your device from the computer, approve the update on the watch, and wait for the update to finish.
If you would like to revert to the last public release software, place the GUPDATE-330.GCD file in the \GARMIN folder. Rename GUPDATE-330.GCD to GUPDATE.GCD before disconnecting your device. To revert the RemoteSW, place the RemoteSW\Downgrades\GUP3114-270.GCD and RemoteSW\Downgrades\GUP-3303-430.GCD in the \GARMIN\REMOTESW folder. NOTE: If you revert to an older version of software, all of your settings will be reset to defaults.