Garry's Mod Server Help!

I recently purchased a server from Nuclear Fallout Servers (NFO Servers), and for some reason when I join my server, in the spawn menu, the tools won’t drop down. I click on it and it turns white and grey, but won’t drop down. Also, it works fine on other servers. For Windows users it works great. When people with Macintosh systems join the problem occurs on their computers. Is there a file or folder I need to add in order to get this to function correctly? Any help is appreciated! Thanks!:smile: