com.crystalidea.macsfancontrol.smcwrite
Universal version · Reported by 134 Macs in the community.
Sighting data is community-sourced — version availability and pricing should be verified with the developer.
Macs Fan Control is a system utility from Crystalidea that lets macOS users monitor and customize fan speeds on Intel and Apple Silicon Macs. The smcwrite helper is a privileged launchDaemon component that handles low-level System Management Controller (SMC) writes, allowing the main application to change fan profiles and set custom speed curves based on temperature thresholds. A native Apple Silicon build of Macs Fan Control has been confirmed running on Macs in the Rosetta Check community.
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1 suggestionThe smcwrite helper is a privileged system component of Macs Fan Control and is not independently updateable. To upgrade it to the native Apple Silicon version, you must update the parent Macs Fan Control application itself. Download the latest version of Macs Fan Control from the vendor's official site at crystalidea.com or check for updates directly within the application (Help menu or preferences pane). The latest installer and update mechanisms will include the native arm64 build of the smcwrite launchDaemon. Once you update the parent application, the helper component is replaced automatically — you do not need to take any separate steps. The native build runs more efficiently on M-series Macs and will continue to work after Apple removes Rosetta 2 in September 2028.
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