1. After opening the iTunes software on your computer, click the avatar icon in the window, as shown in the figure.

2. Then you can log in to your Apple ID account here, as shown in the picture.

3. After successfully logging in, you can view Apple ID account related information in iTunes, such as bound bank cards, address information, etc.

4. Of course, you can also download the software in the iTunes software logged in with your Apple ID. Please click the menu icon in the upper left corner of the iTunes software window.

5. Next, please click the "iTunes Store---Homepage" option in the menu bar, as shown in the picture.

6. Then you can see the same page as you see in the App Store on iPhone and iPad, as shown in the picture

7. Click to open the application software in iTunes Store , you can download them to your computer.

8. Log in to Apple ID on Apple Mac computer

1. If you use Apple ID to log in on Mac computer system, you can also use iTunes software on Mac computer. Method can also log in.

2. In addition, you can also log in in Mac’s “Settings-iCloud”. After logging in here, you can synchronize content with your iPhone.

3. There is also an App Store application on the Mac like the iPhone, and you can use your Apple ID to download Mac application software.

9. Log in to Apple ID on the computer webpage

1. On the Apple ID account management page logged in on the webpage, click the "Manage Apple ID" button to manage the account after logging in. Manage the information accordingly

2. In addition, you can log in with your Apple ID on the web page to access the content in iCloud and log in to the account, as shown in the figure