Mac OS Networking

Updated: 17 Mar 2019

1. How do I change my network setting in Mac OS?

Mac OS allows networking via various methids including Ethernet (wired), Wireless, Bluetooth, Firewall, and Modems. To access it, open System Preferences and clic on Network.

Network Wi-Fi

The settings may be different depending on the type of network. Once connected, you can communicate using a common network protocol called TCP/IP (Transport Control Protocol / Internet Protocol). With TCP/IP you get an IP address assigned to you or you can assign your own static address.

2. What are the different type of Networks available?

a) Ethernet - wirened network using CAT5 cables to a switch, router etc.
b) Wireless (Wi-Fi)- connect to a wireless access point. Need a network name or SSID to connect to.
c) FireWire - For fireware peripherals or to another Mac with firewire.
d) Bluetooth - For connection to bluetooth devices e.g. mobile phone
e) Modem - For connection to modem devices
f) Thunderbolt (Bridge) - For fireware peripherals or to another Mac with thunderbolt
g) VPN - Connection to remote sites over a virtual private network.
h) PPPoE - Point to Point network over Ethernet, usually over DSL lines.
i) 6to4 - Allow IPv6 over IPv4 networks.

3. What is Internet Protocol Version 6 (TCP/IP)?

IPv6 was introduced first with Windows XP and Windows 2003 to expand on IPv4 to get past the limitation of a maximum of 4 Billion IP addresses using the old 32 bit system. IPv6 now uses a much longer IP address using Hexadecimal numbers. Windows 10 will automatically assign an IPv6 address when you configure your normal IPv4 address. Here is an example of an IPv6 address:
fe80::4490:9230:7194:a69b. You can view the IPv6 address in the Network Utility.

4. How do I enable or configure the Firewall?

The Firewall in Mac OScan block outgoing and incoming traffic to your computer. To configue it, goto System Preferences, Security and Privacy, Firewall. You can add or remove programs allowed through the Firewall by adding or removing applications (see Firewall Options):


Click on Change settings and then Add another app and select the program from the list or Browse for the program on the hard disk. If you have uninstalled a program, use the Remove button to remove the program from the Exception list. If you want to allow specific protocols or ports then use the Advanced Settings instead, this will load the Windows Firewall with Advanced Security window.

Security, incoming connections

5. How do I change the Computer or Workgroup name?

Rhe computer name (or hostname) can be set in the System Preferences, Sharing.

. You can change the computer or workgroup name in the System Preferences, Network, Avanced, WINS. Change the workgroup to match the Workgroup name to join.

WINS, workgroup

6. How do I share a folder for other computers to access them?

In System Preferences, Sharing, you need to enable File Sharing. This will allow you to share folders with other users via afp://ip-address.
ADd the folders you want to share and configure the permissions to users.

File sharing on

To share files with Windows users, click on Options, and enable 'Share files and folders using SMB (Windows)' and add
any user accounts to share with.

7. How do I setup a Web Server on Mac OS?

In Windows 10, you can enable the web server feature. Open System Preferences, Sharing and enable Web Sharing.
Users can then access you web site (locally) via http://ip-address/.
Your web site pages should be saved in the Sites folder in your home folder, or computer's website at Public level.

Web Sharing on

8. How do I enable SFTP for file transfers and SSH for remote login?

In System Preferences, Sharing, enable the Remote Login feature.

9. Can I connect my computer to the internet via my Smart Phone?

Yes, you can do this if your computer has a WiFi network adapter installed (or a USB version) and enabled the following on your iPhone phone.
i) In the iPhone Settings, select Cellular and turn on Personal Hotspot.
ii) On the Mac, in Network system preferences, enable Wi-Fi for wireless network and select to the Personal Hotspot.
iii) Alternatively, you can also connect via a Bluetooth connection or USB connection.

10. Can I connect the Mac to a Domain?

Yes, you can connect the Mac to an Open Directory (on a Mac Server), LDAP server or an Active Directory domain.
Before, joining a domain, make sure the the Hostname is unique and valid to join your network's domain. See Sharing preferences.
a) Open System Preferences.
b) Select Users and Groups.
c) Select Logon Options.
d) Select Join for Network Access.
e) Enter name of server or domain name to connect to and Bind to the domain.

11. Can I connect the Mac to a cloud service such as iCloud?

You can enable iCLoud features via the System Preferences, iCloud. Then you can enable which items you want to share with iCloud such as the
iCloud Drive, photos, mail, contacts, calendar, reminders, safari and notes. See also, the iCloud page.

You can also use Microsoft's OneDrive, where you can share files from your Mac with the Cloud and use online Office tools.
Download the app from the OneDrive web page.