We generally don’t encourage the use of custom Trac macros, and we have not provided an interface for this. A poorly written macro can affect the performance for other users. However, if you would like to use macros, we can evaluate and consider installing them for you on a case-by-case basis.
Please upload an archive containing the macro source you want to install to the WebDAV area of your account and contact our support team to let them know it’s there. Then, we will take a look at the source. If it looks reasonable, we will install it into your wiki-macros directory and enable it. If it is a publicly released macro then including a reference to the official website for the macro would also be helpful.