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Network problems after installing Lion on one of three computers

I installed Lion on my MacBook Pro, but left Snow Leopard 10.6.8 on my MacPro and iMac. Then I could no longer connect for filesharing from my MacPro or iMac to the MacBook Pro. I could go to the base folders, including Applications, but I could not access my User folder, even though all the Sharing settings remained the same. However, I could connect from my MacBook Pro to the other two just fine. It appears that the Snow Leopard machines cannot make the connection with the Lion machine. But the Lion machine can connect to the SL machines. This means that I can get my File Sharing done, but it would be more convenient if I could use my MacPro as the central machine.


I have no problems with any of my machines when I connect to the internet or printer through my local network.


I've tried unbinding the sharing and redoing the preferences in the Sharing pane, but the situation stays the same. I've rebooted all three machines a few times. I've run maintenance procedures.


When I boot the MacBook Pro with a Clone of the whole disk from before the installation of Lion (so that the MacBook Pro is once again running on Snow Leopard 10.6.8), I have no connection problems.


There's something that needs fixing in the Snow Leopard/Lion interface when one is Sharing files.

MacPro 2.66mhz 7GB RAM, MacBook Pro early 2008 4GB RAM, old Intel iMac, Mac OS X (10.6.8)

Posted on Jul 21, 2011 4:02 AM

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38 replies

Jul 21, 2011 7:35 AM in response to jsamu50901

I constantly get disconnected from the WiFi network after installing Lion. I browse web pages, suddenly Safari says there is no network connection. I look at the Airport icon in the menu bar and sure enough, it's light gray. I open it, click on my network name and I have network again. After some 10-15 minutes network is lost again. Network signal strenth is very good, wireless router is 3 meters away. MacBook Pro 17", March 2011 model.

Jul 21, 2011 2:34 PM in response to Guntis

Thanks for the suggestion but...


Even if that works it won't fix what Lion broke. I need to connect the existing accounts not new ones. I get around this issue with a combination of Dropbox, Wuala and Pogoplug.


Hope Apple fixes this bug soon as I cannot recommend my clients upgrade to Lion with a network bug of this magnitude.

Jul 21, 2011 2:54 PM in response to Guntis

Found out I can log on to my networked Macs via the Guest account. So I just need to de-secure my network and share everything on the Macs with Read/Write privileges for everybody, and apply changes to enclosed items.


Was able to get my Macs to see my Windows computers by screwing around with networking. Windows computers can't connect to the Macs now. They used to before Lion.


#FAIL

Network problems after installing Lion on one of three computers

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