Does apple mail app support modern authentication

Apple Mail app on macOS and iOS does support Modern Authentication (also known as OAuth 2.0) for some email providers, but the level of support varies depending on the provider and the version of the Mail app.

Here's a breakdown of the support:

macOS Mail app:

• macOS High Sierra (10.13) and later versions support Modern Authentication for Exchange Online, Office 365, and some other providers that use OAuth 2.0.
• macOS Mojave (10.14) and later versions also support Modern Authentication for Gmail and some other providers that use OAuth 2.0.

iOS Mail app:

• iOS 11 and later versions support Modern Authentication for Exchange Online, Office 365, and some other providers that use OAuth 2.0.
• iOS 12 and later versions also support Modern Authentication for Gmail and some other providers that use OAuth 2.0.

Providers that support Modern Authentication in Apple Mail:

• Exchange Online (Office 365)
• Office 365
• Gmail (with OAuth 2.0 enabled)
• Outlook.com (with OAuth 2.0 enabled)
• Some other providers that use OAuth 2.0, such as Yahoo! Mail and AOL Mail

Providers that do not support Modern Authentication in Apple Mail:

• Some older Exchange servers that do not support OAuth 2.0
• Some other providers that do not use OAuth 2.0, such as IMAP or POP3-only servers

If you're using a provider that supports Modern Authentication, you may need to configure your account settings to use OAuth 2.0 instead of traditional username and password authentication. You can usually do this by going to the Mail app's settings, selecting your account, and looking for an option to enable OAuth 2.0 or Modern Authentication.

Keep in mind that even if your provider supports Modern Authentication, the Apple Mail app may not always use it. In some cases, the app may fall back to traditional username and password authentication if it encounters issues with OAuth 2.0.