I use 2 Macs with the same project coming from a git repository.
On the first one, no problem: everything compiles and run smoothly.
On the second new one with a fresh install of MacOS Sierra, I have a issues as soon as I am starting opening the project with Xcode. Sometimes it stops responding instantly (I have to force exit), sometimes it doesn't compile when it should...
What may be the causes of these problems?