[esp-r] Installation of esp-r in Mac os 10.11.4

[Sundaravelpandian Singaravel]

Dear all, 

I am trying to install esp-r in my laptop, which runs on Mac OS X 10.11.4. 

I get the following error: 



As per stackoverflow, this is because of changes in system integrity protection (http://stackoverflow.com/questions/33309005/sudo-mkdir-in-usr-operation-not-permitted-el-capitan). 

However, I still don't know how to update the location of this folder in the installation folder. Has anyone encountered such problems? Could anyone please let me know how to fix it?

Thanking you.

Regards, 
Sundar. 
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