#mac #cpu #sysctl #info #system-information #system #access-key

bin+lib mac-sys-info

CLI + Library to get detailed information about your Mac system. Including CPU, Cache (L1-L3), Memory, and more.

13 releases

0.1.13 Jan 10, 2021
0.1.12 Dec 1, 2020
0.1.11 Nov 30, 2020

#65 in macOS and iOS APIs

Download history 5/week @ 2024-02-22 6/week @ 2024-02-29 1/week @ 2024-03-14 7/week @ 2024-03-21 70/week @ 2024-03-28 27/week @ 2024-04-04

104 downloads per month
Used in 3 crates (via memflow-native)

MIT license



CLI + Library to get detailed information about your Mac system. Including CPU, Cache (L1, L2, L3), Memory, and more. The library is a wrapper around all information that the $ sysctl -a command outputs on Mac. It gives you structured access to it as well as raw access to all keys obtained from $ sysctl -a.

Usage as Lib or as CLI

As Library


mac-sys-info = "<insert latest version>"


use mac_sys_info::get_mac_sys_info;
use mac_sys_info::generated_sysctl_keys::SysctlKey;

fn main() {
    // get struct with all information
    let info = get_mac_sys_info().unwrap();
    // even if IDE shows that the Display trait is missing:
    // it is there. It gets implemented during compile time
    // by "derive_macro" crate.
    println!("{}", info.cpu_info());
    println!("{}", info.cpu_info().cache_info());
    // ...
    println!("CPU @ {} Ghz", info.cpu_info().frequency_ghz());
    // IMPORTANT: Raw Access to all SysctlKeys is
    // available! Keys are located in enum `SysctlKey`
    println!("L3 Cache size extracted manually: {}",
    // Some convenient getters.
    println!("L2 Cache Size in KB: {}",
    println!("System has {} GB of RAM", info.mem_info().total_memory_mb())

Run/install as CLI

$ cargo install mac-sys-info
$ mac-sys-info      # simple
$ mac-sys-info -h   # help
$ mac-sys-info -c   # complex
$ mac-sys-info -r   # raw

Example output

    name     : Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
    arch     : X86_64
    cores    : 4
    frequency: 2.7 GHz
    L1D-Cache: 32KB
    L1I-Cache: 32KB
    L2-Cache : 256KB
    L3-Cache : 3072KB

    total: 8192MB

    version: 10.15.7
    kernel : Darwin Kernel Version 19.6.0Thu Oct 29 225645 PDT 2020; rootxnu-6153.141.2.2~1/RELEASE_X86_64

Why another tool?

There is already a popular crate called sys-info, that's true. But it doesn't show information about the size of L1 cache, or cache in general. I need this information for a task I'm working on. Therefore I created this crate. It was also fun and as always I learned new stuff. :)


MIT License. See "LICENSE" file in repository.


~142K SLoC