You can install the support package by doing the following:
- Follow only the download instructions from here: https://www.mathworks.com/matlabcentral/answers/339542-how-do-i-install-a-support-package-for-matlab-r2016b-and-later-releases-using-add-on-explorer-on-a-c?s_tid=answers_rc1-1_p1_Topic
- After downloading the files and transfering them to the computer without internet access, follow the instructions in the downloaded "readme.txt" file to peform the installation.
If you need additional help, consider contacting Install and Licensing Support to get help installing the support package offline. You can send them an email at support@mathworks.com or create a help ticket at https://www.mathworks.com/support/contact_us.html.
