# MKL and libm compile notes: macOS

**URL:** <https://discourse.julialang.org/t/mkl-and-libm-compile-notes-macos/21024>\
**Category:** General Usage\
**Created:** [February 20, 2019, 9:48pm UTC](https://discourse.julialang.org/t/mkl-and-libm-compile-notes-macos/21024 "2019-02-20T21:48:15Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Elrod](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/elrod/32/22461_2.png) [@Elrod](https://discourse.julialang.org/u/Elrod)\
**Post date:** [February 21, 2019, 2:04am UTC](https://discourse.julialang.org/t/mkl-and-libm-compile-notes-macos/21024/5 "2019-02-21T02:04:22Z")

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> [@Egwene\_al\_Vere](#):
>
> modify `Make.inc` to use mkl and libm:

You can instead specify these in a `Make.user` file.  
Also, a couple warnings:

1. MKL is incompatible with ARPACK, a dependency of packages such as Distributions and LightGraphs.
2. SpecialFunctions.jl can take advantage of openlibm, but not intellibm, for much better performance. Not as severe as the above, because SpecialFunctions will still work. It can however be many times slower.

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