If the Mac is new it shouldn't be 10.6.8 - are you sure it isn't 10.8.3? Here are some things to try, if you haven't already.
Wifi problems seem to crop up a lot on here and unfortunately there doesn't seem to be a 'one fix' solution.
However, sometimes any one of the following can help although, unfortunately, not always - in no particular order:
- Check wifi security - if it's WEP change it to WPA or WPA2 (preferably, as it's more secure)
- Change the wifi channel on the router
- Create a new Network Location: http://support.apple.com/kb/HT5289
- Reboot the router
Also take a look at this link and the links within the article for other ideas. They mainly reference Lion, but still seem to be relevant to Mountain Lion:
...and this link:
I had the same problem for months (brand new iMac, 10.8.3, wifi drops randomly and often), and I tried everything I could find in these boards. Finally, someone mentioned trying a USB wireless adapter, and it totally worked for me (one week now without a single wifi drop)! Here's my thread from a few weeks ago: https://discussions.apple.com/message/21964962?ac_cid=op123456#21964962
I'm not saying this is the best possible fix, but spending $20 on a wireless adapter was worth not having to spend another week researching and trying other solutions (for me anyways).
I tried changing my router channel and Youtube managed to load videos and pages loaded for a good 20minutes before the same issues resurfaced.
I believe I just have a settings issue but I just don't know what it is.
Nbod702, yhy would getting a USB wireless adapter help the situation? I'm a complete idiot when it comes to computers so I really appreciate your help and everybody's assistance!
Nbod contributed to this thread and his suggestion worked for poster derekpante:
But also take at Applal's and LOtang's suggestions in this thread:
The problem is a combination of the airport wireless adapter built into the computer and software updates that changed the way the airport wireless adapter functioned. I had my imac for almost 2 years before this happened with the same wireless router. Then after a software update the problem started to happen. What you are doing is using a completely different device to connect to your router. These external devices are not affected by the software update and thus work properly. I am baffled as to how Apple cannot fix this problem. Perhaps it would involve replacing all the airport adapters which would be quite expensive. Anyways, a relatively cheap solution has completely resolved the problem for me and several others who have posted their success after trying my solution.
I hope you will try it for yourself.