Step 1: Find the settings
First, you’ll need to open up System Preferences. You can select from the Dock, or by clicking the Apple menu and selecting System Preferences.
Step 2: Section
Next, open up Language & Text. You can drag the preferred languages in any order. For now, select Region from the tabs along the top.
Step 3: Regional
From the drop-down box at the top of the window you can select the country that you want your system to be set up with.
Step 4: One day
You also have the option to set what you count as the first day of the week. Whatever your opinion is, use the drop-down box on the right to choose.
Step 5: Customise
Use the Customise button to change the way dates appear. Drag elements around and click the arrows to customise their appearance.
Step 6: Currency
At the bottom of the window is the currency selection box. Depending on where you are you can choose the correct currency from this list.
Step 7: Imperial or metric?
One of the biggest changes you can make is choosing between the metric or imperial measurement system.
Step 8: In the zone
Now hit Show All at the top of the window and select Date & Time. You can select the option that lets your Mac look up your location and time zone for you.
Step 9: Where in the world?
Alternatively you can choose to set the time manually, by running your mouse over the world map and clicking the nearest city to your location.
(Click on the image below to zoom in and view the annotations)