Exporting your Address Book(s) from Thunderbird
- Open Thunderbird.
- This process will be nearly identical on either Mac or Windows.
- Select the Address Book
- Select the desired Address Book you would like to export, then go to Tools > Export.
- Give a descriptive name for the exported Address Book file (e.g., Address Book), then select a location where you would like to save this file.
- In the Format: drop down menu, select Comma Separated to create a CSV file, then click on Save to finish the process.