A figure out many users face issues while taking backup of their Gmail emails, and the problem increases as the number of emails increases. So, to overcome this issue you can use the Gmail backup tool. With this tool, you can take the backup of your Gmail items in a single click. The tool is easy to use and you can backup all the Gmail items including attachments.
Follow this steps:-
1.Start by typing takeout google com/settings/takeout in your browser's Address field. If you're not signed into your Google account, you must sign in before you can use the utility.
Use the scroll bar on the right of the screen to view the list of data that you can back up with the utility:
2.You'll see all the various types of data you can access with your Google account.
3. Slide the Gmail slider (on the right of the screen) to the right to back up your Gmail account. If you click the down arrow to the left of the slider, the screen expands and you can further refine which parts of your Gmail you want to back up:
Choose one of the following options:
Click the toggle next to Include all your mail to back up all your Gmail.
Click the toggle button next to Select labels to bring up a screen that lets you choose which labels (folders) you want to back up.
4. When you've finished selecting data types to back up, click the Next button on the lower left of the screen
5. When you're finished selecting your archive format options, click the Create Archive button in the lower left corner.
You can try Gmail Backup for Mac Software. This application easily backup Gmail Account data on Mac OS. This software is very simple to operate and handle the process wisely. It allows users to save Gmail Backup for Mac in Multiple file formats like - PST, MBOX, MSG, EML, & EMLX. This software is easy to handle by all technical and non-technical users without any professional help. This software supports all Mac OS versions.