How can I install git extension in Mac OS?

I use Mac OS High Sierra version 10.13.6

I read here : https://git-extensions-documentation.readthedocs.io/en/latest/getting_started.html#installation-macos-2-5x-only

If I run : mono GitExtensions.exe in the terminal there exist error like this :

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Process 767 detached
(lldb) quit
Abort trap: 6

How can I solve the error?

Update

I get a solution, so I try change to be like this :

mono --arch=32 GitExtensions.exe

There is exist new error like this :

Fontconfig warning: ignoring UTF-8: not a valid region tag

I use Mac OS High Sierra version 10.13.6

I want to install GitExtensions

I read here : https://git-extensions-documentation.readthedocs.io/en/latest/getting_started.html#installation-macos-2-5x-only

If I run : mono GitExtensions.exe in the terminal there exist error like this :

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

Process 767 detached
(lldb) quit
Abort trap: 6

How can I solve the error?

Update

I get a solution, so I try change to be like this :

mono --arch=32 GitExtensions.exe

There is exist new error like this :

Fontconfig warning: ignoring UTF-8: not a valid region tag

If I run mono --version in the terminal, the result like this :

How can I solve the new error?

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