# Trouble compiling FreeFem++-cs on MacOS

**URL:** <https://community.freefem.org/t/trouble-compiling-freefem-cs-on-macos/568>\
**Category:** FreeFEM installation\
**Created:** [September 4, 2020, 12:54pm UTC](https://community.freefem.org/t/trouble-compiling-freefem-cs-on-macos/568 "2020-09-04T12:54:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Yingyuan\_Li](https://avatars.discourse-cdn.com/v4/letter/y/ea666f/32.png) [@Yingyuan\_Li](https://community.freefem.org/u/Yingyuan_Li)\
**Post date:** [September 4, 2020, 12:54pm UTC](https://community.freefem.org/t/trouble-compiling-freefem-cs-on-macos/568/1 "2020-09-04T12:54:54Z")

</div>

When hg clone --insecure [https://www.ann.jussieu.fr/~lehyaric/ffcs/dev](https://www.ann.jussieu.fr/~lehyaric/ffcs/dev) ffcs-dev on my computer terminal,it shows “nodename nor servname provided, or not known”.  
I wonder why