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mactop vs macmon: catalog facts
mactop	macmon
Free Free and open source under the MIT licence.	Free Free, with source published on GitHub.
macOS, Command line	macOS, Command line
Separate metrics for efficiency and performance cores Shows GPU usage and frequency, power draw and temperatures	No sudo needed, unlike powermetrics Shows CPU, GPU and Neural Engine power draw
Only works on Apple Silicon Macs Terminal interface only	Apple Silicon Macs only Relies on a private macOS API that could change
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.