In today's era of multi-terabyte hard drives and Internet storage, many of us do not keep as close to disk usage as we used to. Nevertheless, the largest stations eventually fill up. If you don't know how to check disk space usage on your Mac, see.
Options 1 and 2: From the Finder
Finder gives you a couple of ways to see how much free disk space you have. These are the easiest ways.
Preview of the storage device. In macOS, if you select and item in the Finder and press the spacebar on the keyboard, you get a preview of the item. For example, if you select a text document and then press the space bar, you can see what's in the document without opening it.
You can use preview to check the storage device's capacity. That's how it is.
1. Select the storage device on the desktop. (To get the storage device to appear on the desktop, go to the Finder and select Finder> Settings click General, and change the setting for Show these items on Desktop .) Or open a Finder window, see the left column under Units heading, and select the storage device.
2. Press the spacebar. You should see a window showing the capacity of the storage device and free space.
3. To close the window, press the space bar again, or press Command-W, or click the close window icon (circle X) at the top left.
Status field of the Finder window. If you want to have available disk space at any time from the Finder, you can turn on the Finder status bar.
1. Open a Finder window if you don't have one open already (click the Finder's Dock icon or go to File> New Finder Window ).
2. Open the menu View and select Show Status Bar . This shows you how many items are in the current folder, and if you see a folder on your hard drive (such as the Applications folder or Documents), you also get a reading of the hard disk's free space.  MacOS Disk Space Finder Status Bar "width =" 700 "height =" 251 "data imageid =" 100752438 "data-license =" IDG "/> IDG Want an always visible overview Go to the menu View and select Show status bar
Want an always visible overview Go to the menu View and select Show status bar
Options 3: Get info
1 Find the hard drive in the Finder and select it, if it appears in the Finder window sidebar or on the desktop (it does not go by default – go to Finder> Settings to change it), click on the hard disk's icon in one of these locations.If your hard disk icon is not displayed, go to Go> Computer and then click the hard disk icon under Devices.
2. Click File menu and select Get info or press Co man-I on the keyboard.
The Info window shows capacity, free space and used space As other information.
Option 4: About this Mac
In recent versions of MacOS (Yosemite or later) you can easily check the disk usage from the Om box.
1. Open the Apple menu, then select About This Mac .
2. Click the Storage tab in the toolbar to see how much disk space you have available. (At OS X Mountain Lion or Mavericks, click More Info and then click Storage .)
You also get a simplified overview of what files are eating your storage space.
Option 5: From Disk Utility
You can also see free disk space from the Mac's Disk Utility app. Open Spotlight by clicking the magnifying glass at the top right of the screen, and then type Disk Utility in the search box that appears. When Disk Utility appears in the list and is highlighted, press the Enter key. Disk tools are also available in Programs> Tools .
When Disk Utility is opened, select the hard disk name from the list. You can see the station's capacity, free space, used space and other info. You can also check free space for any drive you have connected to your Mac from this window, whether it's a USB flash drive or external hard drive.