This article explains how to drag and drop on Mac. Use an external mouse or the built-in trackpad to move items on your computer or capture text and images. The instructions in this article apply to macOS Mojave (10.14) and later.
MacBook How to Drag and Drop Files!
You have two options for clicking and dragging on a MacBook: use the trackpad or a wired or wireless mouse. The process for both options is similar and follows these steps.
Click or tap to select and highlight the item you want to move.
Hold down the trackpad or mouse while dragging the object.