Q: No Wake-on-LAN possible since updating to ML

vestax32, does your router handle Bonjour Sleep Proxy? Like an AirPort base station would do.

This has FIXED THE PROBLEM!!!!!! I recenlty changed from a sky router to a BT router which was set to WAP/WPA2. It seems that Bonjour does not like WPA2 so you need to change your network settings to WPA. This worked for me......

I'm happy to have helped you, I'll check tomorrow if the iMac is still connected. And if it's OK then the problem will be solved after 6 months of research lol

Thanks. I am going to leave the computer on tonight and check tomorrw if its still working. Will let you know.

I'll let you know too and if the problem is still present, the only solution that works for me is to plug my iMac with an ethernet cable to my Time Capsule.

But I don't want to do that because the Time Capsule is in my living room and I want to use my iMac in my bedroom.

So did it Work for you? I was able to access it, not the first time, it's a strange random behaviour that iMac has. I think there is nothing else to try... We have to wait APPLE to make an update. I've read that 10.8.3 will focus on AirPort and AirPlay issues, does someone tried it? Is it solving this issue?

It seems to be working fine for me! I will continue to test over the next few days and report back.....

So you just changed WPA/WPA2 settings? Or did you change something else that was said previously on this thread or elsewhere?

I have just changed WPA/WPA2 to WPA, seems to have done the trick. With this in mind the problem was with my BT Homehub 3.0 (UK router) and not with the Apple hardware/software....

And do you leave you Mac on, or asleep?

Mac was sleeping for 5 hours today and I was able to wake with my iphone remote app when I got home....

Which Mac model is it?

Imac i5, early 2011

Mine is a mid2011, so I hope it should work... But this morning I wasn't able to wake it. I tried a lot of times before it had respond.

So there is something going wrong somewhere...

What share settings do you use? Can you send a screen of your share settings from system preferences?

Vestax32, how did you change your Homehub to just WPA? I have a Homehub 2 and I can find only two encryption modes: WEP, and WPA and WPA2. I tried the advanced settings but could't find just a WPA option. Maybe it's because it is a Homehub 2 rather than a 3.