Final answer:
To select multiple files on a Mac, use drag and drop to highlight the desired files or hold the Command key while clicking each file individually. This works for adjacent or scattered files.
Step-by-step explanation:
To select multiple files at once on a Mac, you can use the drag and drop method. Click and hold your mouse or trackpad button on the first file you want to select. Then, without releasing the button, drag over the other files you wish to select, and they will be highlighted. Once you have highlighted all the desired files, you can release the mouse or trackpad button. This method is ideal when the files are visually accessible and grouped together. If the files you want to select are not next to each other, you can press and hold the Command key on your keyboard while clicking each file individually. This allows you to select multiple files that are scattered.