Apps similar to ACTVT include CPU-Z, which is free. Other options are HWiNFO (32/64), Process Explorer, htop and Speccy. System Information Utilities like ACTVT are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, Android and iPhone.
Displays Mac CPU, GPU, memory, storage, and network stats with per-core and per-volume detail, plain-language explanations, process analysis, on-demand memory reclaim, battery health, multiple themes, optional helper for temperature, and fully private.
Hong Kong
iKnowMyMac is a native Mac app that explains what your Mac is doing. It groups about 1,000 background processes into the apps they belong to, and its "Why is my Mac slow?" button reads the last hour and names the cause, with the evidence and one action for each.
India
A tiny native macOS menu-bar line for CPU, GPU, RAM, network activity, and the apps behind meaningful spikes.
Australia
