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Do you mean a Wifi card to join a network ?
Wifi on the mac is called Airport .
You can see if the Mac has an airport card by , Going in to Apple menu , About this Mac . Moire info . see the list of hardware on the Mac , and look for Airport in the hardware list .
All Macs have Ethernet , A wired connection BTW.
Does this help?
From the get info:
Airport Wireless card has the following info:
Firmware Version: 9.52
Is that enough info for you to say Yes or No that this machine could be able to access our WBA personal or is it WPA personal? We have 3 machines attached at this point and working well.
ok ok , lets try .
Here's a guide to setup wireless connections on the Mac once the Airport router ot other router is setup. Please can you go in to the Apple menu , system preferences , Network control panel , and press - on all the connections in the list one by one to remove them.Then press + for each device one by one .-please try to follow these steps for setting up wireless connection .1 Go to the Apple menu , System preference .2 Open the network control panel pane .3 Choose edit locations from the drop down menu in , network pane .4 Click the + button to add a new location .5 Name the location "new"6 Select the NEW location from the drop down menu , in the network pane .7 Click on airport for the new location , from side list .8 Turn airport on if it is off .9 In the network name , choose your Wireless SSID , if you do not see it , use the join other network and select your routers SSID. , type in the name and , select the type of security used , in most cases it will be either WPA2 personal , or WEP , enter your network password XXXXX10 Tick the show airport in display bar option .11 Click advanced button .12 Go to the airport tab , add the SSID if its not shown it the list .13 Go to the TCP/IP tab in advanced , select use DHCP14 At the top of the screen use the new airport menu to join the network.15 In the TCP/IP settings tab , you should now see your have a connection to the router .and your IP address , subnet mask etc is now automatically filled in .16 You should now be online , and connected to your LAN network . "local area"
The older imacs wifi maybe a slower standard than the other Macs Pcs , etc , so even if you get the built in airport working , you may want to upgrade to wireless N using a USB wireless N adapter for instance . If you have good signal and a dual band router such as the new Air port extreme that does both A , B , G & N at the same time etc , and at the same time so other computers are still running at N speeds , you wont have any problems .