## Required For Setup
[A OneSignal account](🔗) if you do not already have one
Your OneSignal App ID, available in [Keys & IDs](🔗)
## macOS Setup
### Option 1: Mac Catalyst
If you built your app with Mac Catalyst, you can setup [OneSignal's XCFramework SDK](🔗).
More details in this [guide on our blog](🔗).
### Option 2: API
OneSignal does not currently have a dedicated macOS SDK. However, OneSignal can be used to send notifications to macOS apps. Please refer to [Apple's documentation](🔗) to learn how to obtain a push token.
To register a macOS device, call OneSignal's [Add a Device POST /players](🔗) with a `
device_type` of `
9` to represent the macOS platform, and pass in the push token for the `
### Updating User Events
With the [Add a Device POST /players](🔗) you can set your own custom `
external_user_id` and update custom data (called [Data Tags](🔗) with the [Edit tags with external user id](🔗).
Otherwise, you can save the OneSignal `
player_id` provided in the response to update device data with [Edit device](🔗) or [New session](🔗).