Q: find my mac not showing mac location, but its online

Just wanted to say that I had the same issue, I was connected via Ethernet, as soon as I turned the WIFI on I was able to Find my Mac Mini.

this didn't work, but another post about needing Wifi turned on for location services to work was the answer for me

I'm having the same problem with el capitan. Find my mac won't show location in find my iphone.

Thanks, worked for me.

Dear all, I solved this issue by turning Wi-Fi on. It was off since I'm using LAN cable to connect to network.

As simple as this sounds, this is exactly what the problem is AND resolves it!

No Wifi = No Find My iPhone Location Services available

If your Mac is only using a LAN Ethernet Cable to connect to the internet

Find My iPhone will not display location of the Mac but will only state it's online

Unfortunately, WiFi needs to be on for Find My iPhone to locate the Mac itself

Open system preferences > open the pad lock by entering user name & password > check the box enable location services , maps , weather .

Open safari > safari preferences > website use of location services > prompt for each website one time only .

some settings are there in screen shot to be enabled  & you can also , follow an apple article : About Location Services in OS X and Safari - Apple Support