FindObjectOfType is obsolete: use FindFirstObjectByType or FindAnyObjectByType

What changed

Object.FindObjectOfType is obsolete in Unity 6. Unity split it in two so you can say what you need. FindFirstObjectByType returns the same object the old call did. FindAnyObjectByType returns any matching object and is faster, because it does not have to work out which one is first.

If you only ever have one instance, such as a GameManager, FindAnyObjectByType is the better choice. The checker on this site uses FindFirstObjectByType, because it is the replacement that cannot change your game's behaviour.

The old includeInactive bool becomes an enum: pass FindObjectsInactive.Include to keep finding disabled objects.

Before and after

var manager = FindObjectOfType<GameManager>();
var menu = FindObjectOfType<PauseMenu>(true);

var manager = FindFirstObjectByType<GameManager>();
var menu = FindFirstObjectByType<PauseMenu>(FindObjectsInactive.Include);

// Faster when any instance will do:
var anyManager = FindAnyObjectByType<GameManager>();

Questions

Is FindAnyObjectByType safe when there are several matches?

It returns one of them, and which one is not guaranteed; it can differ between runs and platforms. Use it when there is only ever one instance, such as a GameManager. When several exist and you need a predictable one, keep an explicit reference instead.

Can I call these methods every frame?

Avoid it. Both search every loaded object of that type. Call them once in Awake or Start and keep the result in a field, or have objects register themselves with a manager when they spawn.

Sources

• Unity Manual: Upgrade to Unity 6.0

Related Unity 6 changes

• Rigidbody.velocity is obsolete in Unity 6: use linearVelocity Unity 6.0 · Physics
• Rigidbody.drag is obsolete in Unity 6: use linearDamping Unity 6.0 · Physics
• FindObjectsOfType is obsolete: use FindObjectsByType Unity 6.0 · Scripting
• FindObjectsSortMode is deprecated in Unity 6.5: drop the sort argument Unity 6.5 · Scripting
• PhysicMaterial is now PhysicsMaterial in Unity 6 Unity 6.0 · Physics

Every Unity 6.x change, by version