Mac OS X Computer Name and IP Address

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To locate the name of your Mac OS X computer or it's current IP address:

Click the Apple menu in the top left corner of your screen.
Select System Settings.
Scroll down in the left sidebar and click on General. Then select About . Here, you can see the "Name" of your Mac.
To find your IP address, go back to the main System Settings screen.
In the left sidebar, select Network. This will open the Network settings.
Choose your network connection type on the left side (e.g., Wi-Fi, Ethernet).
Click on "Details".
Scroll down to see the IP address.