Currently Being ModeratedNov 15, 2013 12:46 PM (in response to TJ180)
Thank you for the details of the issue you are experiencing with Wi-Fi on your iMac. I would be concerned about this too.
I recommend following the steps in the section labeled, "Symptom: The network connection drops unexpectedly" in the following article to resolve an issue like the one you described:
Thank you for posting in the Apple Support Community.
Currently Being ModeratedNov 22, 2013 11:35 AM (in response to TJ180)
I was having the same issue. My network was there it just wouldn't connect automatically as it used to. My understanding is that OS X 10.7.5 had an a flaw with this exact issue. I'm upgrading to OS X Maverick as I type this because the fix for your and my issue is corrected.
Let me know how it goes?
Currently Being ModeratedNov 23, 2013 8:38 AM (in response to TJ180)
Thank you for the additional information. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action
All the best,