

If your Mac runs on OS 10.11/El Capitan or above, you won’t need one.
CANT GET EARTHLINK EMAIL ON MAC OS 10.9.5 UPDATE
If your OS is affected, be sure to create a secure mail key to set up or update your email. Analysts have questioned business model and economics of public hotspots, but a detailed analysed must be performed. If you use Apple Mail or Mac Mail with macOS 10.10/Yosemite or older, you’ll have to update your email settings. Hotspots use WLANs for a public service, tipically offering for a monthly fee.

So one should not confuse hotspots with wireless LANs. If this doesn’t fix your Gmail authentication issues on your Mac OS 10.15 Mail app, then make sure you don’t have a network firewall working against your Mail account. You can also use the Mail Settings Lookup tool to confirm the settings for Gmail. Note: With IMAP your emails are stored on the server so you can continue to use the Gmail web client and, of course, read your email on your mobile devices. Using either a laptop or PDA that is Wi-Fi 802.11b wirelessly-enabled, customers can surf the Internet or check email. Check Mail preferences to ensure your email account settings are current. You may find an email using the web client for Gmail that you were not able to find in the Apple Mail client. Press Tab to move to the next field (Important) Enjoy your email life.

This used to be a real problem but it seems to be mostly resolved but if you can’t find an important Gmail email, you might want to use the web client to do another search. Open your email account in system preferences. The one drawback that people complain about is that Apple Mail’s search feature doesn’t work that well with Gmail. You can filter mail from specific people, unread messages, read, messages, you name it, in order to work efficiently. Apple Mail is a standard email client but it does have a notable mail filtering feature enabling you to filter mail based on criteria of your choice.
