※Only macOS.

SearchStringInAssets is an Editor extension that allows you to search the UnityEditor for strings stored in a scene, Prefab, or ScriptableObject.

※Cannot be used when Spotlight is off because it uses mdfind.

Open SearchStringInAssets from Tools > Shibuya24 > SearchStringInAssets.

Create setting(ScriptableObject) from Create > Shibuya24 > SearchStringInAssets .
Set it in the SearchSetting of SearchStringInAssets, press the Save button to save the settings to the Editor.

After Unity 2019.3.4f1, Unity 2020.1a21, that support path query parameter of git package. You can add https://github.com/baobao/SearchStringInAssets.git?path=Assets/SearchStringInAssets to Package Manager

or add "info.shibuya24.search-string-in-assets":"https://github.com/baobao/SearchStringInAssets.git?path=Assets/SearchStringInAssets" to Packages/manifest.json.

Download and import unitypackage from the following page.
https://github.com/baobao/SearchStringInAssets/releases/

This library is under the MIT License.