The Spark GO USB audio input issue on computers running macOS 26 has been resolved by updating the amp’s firmware.
How to Update Spark GO Firmware on a Mac Running macOS 26
Download the Spark GO firmware updater: Download Here
Unzip the file: spark_go_firmware_updater_mac_v1_15_0_209_bt_1_96.zip
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Right-click the updater app and select Open.
If you see a security warning, please follow this guide to allow the app to run: How to Bypass macOS Security Warnings
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Follow the instructions shown in the updater to complete the firmware update for Spark GO.
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Wait until the firmware update finishes. The amp will turn off automatically when the update is complete.
If you see “updater quit unexpectedly,” keep the firmware updater open. It should finish the update process shortly afterward.