Q: can’t make phone call on my mac from yosemite from contacts

I have the same issue. All my settings are correct, but the Audio icon to call my contacts is grayed out.

Same issue here I'm afraid. I believe my settings are correct too.

I am having the same problem. I can't make phone calls from iMac, I get a message saying "iPhone calls not available"

I read that the iMac has to 2012 model or later (here), mine is an iMac early 2009 so I thought that was the obvious problem...

...but strangely I can receive and answer calls on my iMac.

Hi Same problem works on Macbook Pro 2012 but not on 2013 Mac Mini?

Hi. sane problem almost.  All audio icons, except a few, are greyed out.

These advanced features will require the general release (and installation on your iDevice) of IOS 8.1, available Monday.

When I receive calls on my iPhone my mac indicates that I have a Phone call & I can answer the call.

But when I try to make regular call from my mac I get an error iPhone calls not available....

also I can't send or receive regular sms on my mac.

I think it's because iOS should be updated to 8.1 maybe it's not working on 8.0.2

Got mine to work. It looks like you have to be signed in on FaceTime on both devices first, then in FaceTime make sure on your iPhone you are using your apple id and allow iPhone cellular call enabled.

You are one step ahead of me. When my iPhone rings, my MBP does nothing. They are both in the same network, I have checked all the settings.

And if I want to initiate a call from the MBP, I cannot even do it because the icon is grayed out.

This fixed my issue! THANK YOU!

I jumped the gun... Sorry!

It fixed the incoming calls issue, but not the ongoing. Making calls from MBP is still grayed out.

I have the same problem with my macbook pro (late 2013 edition) and my iPhone 5

All done, but only can receive call. not making calls

Same here! I can only call people with iOS devices (as usual, via FaceTime or sending iMessage), but not calling the rest (the option is grayed out). I receive incoming calls, though.