To target operating systems in your campaign from the Unity Ads User Acquisition dashboard:
- From the Apps page, select the app that has the campaign that you want to modify. The Campaigns page for this app appears.
- Select the campaign you want to modify, or create a new campaign.
- Scroll to the Device targeting section.
- Select the edit icon next to Operating system
- Select a Minimum OS version and a Maximum OS version to define the operating system range to target
- Select Save to apply your preferences.