There are three main methods to find the serial number of Mac, which are suitable for different scenarios. 1. If the Mac can be turned on normally, click Apple menu > "About this machine" or use the terminal command system_profiler SPHardwareDataType to view; 2. If the power cannot be turned on, you can search on the bottom of the body, power adapter, packaging box or invoice; 3. If the device is logged in to the Apple ID and enabled "Find My Mac", you can view the serial number online through the "Device" page in the Apple official website account.

Finding a Mac serial number is actually quite simple. The key is to know several different methods to deal with different situations. For example, your Mac can still boot normally, or it can no longer enter the system, or even if you don’t have a computer at all, only some packaging or invoices, you can find the serial number.

1. View the serial number on available Macs

If your Mac can boot and log in to the system normally, this is the most direct way:

• Click the Apple menu in the upper left corner ? > “About this machine”
• The model and version information will be displayed in the pop-up window. Click "System Report" (the old version is called "More Information") to see the serial number (Serial Number)

In addition, you can also quickly obtain it through terminal commands:

• Open Terminal
• Enter the command: system_profiler SPHardwareDataType
• After entering, find "Serial Number (system)" in the output content.

This method is suitable for you when you are preparing to sell your device or contact Apple Support.

2. How to check if the computer is not turned on

Sometimes your Mac fails and cannot be turned on, but you need a serial number. You can take a look at these places:

• Back or bottom of the body : Most MacBooks, iMacs and Mac minis will have a string of alphanumeric prints at the bottom, that is, the serial number
• Power adapter or original outer packaging box : Sometimes the label on the packaging box will also be marked with serial numbers, especially machines that have just been purchased.
• Purchase an invoice or warranty card : If you purchase it through formal channels, there will usually be a device serial number record on the invoice or receipt.

This situation is often caused by confirming equipment information before second-hand transactions or preparing information before repair.

3. Find registered devices through your Apple account

If you have logged in to this Mac with Apple ID and enabled "Find My Mac", you can view it online through Apple's official website:

• Log in to the official Apple ID website
• Go to the "Device" section and click on your Mac device
• The page will display the device model, color, and serial number

This method is especially suitable for forgetting which device has what serial number, and it is also suitable for your needs to manage multiple devices.

Basically these are the methods. Based on the information and device status you currently have, you can always find a way to get the serial number. It doesn’t have to be turned on or use terminal commands. The key is to flexibly use the resources at hand.

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