I downloaded both the standard and the off-line installer for 2019 update 2, and even ran it once with sudo, in all cases I am getting "/Users/user/Downloads/system_studio_2019" as not writable, "check permissions", weird bug with the installer that I cannot bypass. I am on 10.13.6 .
The "support" link in the installer is also a disappointment, takes me to the Intel Support portal, not to where I "need to be", and I could find System Studio from there, apparently they portal insists that you choose categories, subcategories etc instead of providing a search bar.
Can you post some screenshots of what stage of the installation process you are getting this?
Alternatively, try deleting the 'system_studio_2019' directory and do the install again. You should not need to install as sudo.
If you see the same error, please provide a screenshot and a .log file. It should be inside the unzipped directory or the location of your install.
Thanks, for pointing out the issue with support link. Our team will look into it.