You can retrieve interface data by using ipconfig to pull current DHCP information like so: When using ipconfig, be sure to use the proper interface address otherwise you may run into other problems, or find nothing changes at all. The first approach uses the ever useful ipconfig tool: There are two different ways to renew the DHCP lease from the OS X command line. Renewing a DHCP Lease from the Command Line The other obvious advantage with a command line approach is possibility of using the lease renewal in a script or as part of an automated task within cron. This is typically best used by advanced users, but it can also be helpful for remote troubleshooting if you can only SSH into a remote Mac and something like Screen Sharing is not available to you. If the reason you are renewing DHCP is to try and get a new IP address but the router continues to stubbornly assign the same LAN IP over and over again, consider setting a static IP instead by configuring DHCP with manual addresses.Īnother approach, though more advanced, is to renew DHCP by way of the command line. Often renewing a DHCP lease means the Mac will end up with a different local IP address than it had before, though sometimes you will end up with the same one. After the IP, subnet, and router has repopulated with new IP information, click “OK” and exit out of System Preferences.Select the “TCP/IP” tab and then select the “Renew DHCP Lease” button.Click on the “Advanced” button in the lower right corner.Click on “Network” and select the currently active network connection from the left side list, usually this will have a green icon next to it and say ‘Connected’.

Pull down the  Apple menu and choose “System Preferences”.This is the easiest way to renew a DHCP lease from Mac OS X: Renew DHCP Lease from OS X System Preferences This is a common trick for troubleshooting network issues, and can be helpful when resolving problems with internet connectivity when a wi-fi connection has been determined to be stable, or when a machine on the network can’t access the outside world after power-cycling a broadband modem or router. This is all well and good and usually functions just fine, but sometimes you need to renew a DHCP lease, which basically means you’ll be retrieving a new IP address and routing data from the DHCP server.

Mac ipconfig command