On your Mac, do any of the following:
Click Apple Menu > About This Mac > Storage > Manage to open the storage management window. Click on the Documents option, and you can see files categorized as Large Files, Downloads, Unsupported Apps, etc. Sort files in the Large files list by size and delete the ones you don't need. Empty your Trash.
In the iMovie app on your Mac, select a video clip in the timeline whose source file you want to locate in the Finder. Choose File > Reveal in Finder. The folder containing the selected clip's source file opens in the Finder.
On a Mac with macOS Catalina or later:
View Hidden Files in Finder In Finder, you can click your hard drive under Locations, then open your Macintosh HD folder. Press Command + Shift + . (period) to make the hidden files appear. You can also do the same from inside the Documents, Applications, and Desktop folders.
Here's how to access the Library folder in macOS:
Close all your programs and then click on the Finder menu. Select Preferences and then click on the General tab. Make sure there's a checkmark showing next to 'External Drives'. Now your flash drive should appear on the desktop.
Compress a file or folder: Control-click it or tap it using two fingers, then choose Compress from the shortcut menu. If you compress a single item, the compressed file has the name of the original item with the . zip extension. If you compress multiple items at once, the compressed file is called Archive.
Tag an open file: Hold the pointer to the right of the document title, click the down arrow , click in the Tags field, then enter a new tag, or choose one from the list. Tag a new file when you save it: Click File > Save. In the Save dialog, click in the Tags field, then enter a new tag, or choose one from the list.
Move items into folders On your Mac, click the Finder icon in the Dock to open a Finder window. Do any of the following: Put an item in a folder: Drag it to the folder. Put several items in a folder: Select the items, then drag one of the items to the folder.
Just press Command-O in your app, navigate to the file, select it, and click Open or press Return. If you want to view a file when you're in an Open dialog, you can select and it press the space bar to view it in Quick Look.
Click the desktop, choose View > Sort By, then choose an option. If you want to control the placement of your files on the desktop, keep Sort By set to none. You can still arrange files neatly when desired—just click the desktop, choose View > Clean Up By, then choose how you'd like to arrange the files.
Delete an item from your Mac or iCloud Drive On your Mac, drag the item to the Trash in the Dock or select the item, then press Command-Delete. If an item is locked, click Continue to confirm you want to move the locked item to the Trash.
You can quickly combine multiple files into a PDF right from your desktop or a Finder window.