Is it possible to replicate the Windows 7 'show desktop' behaviour in Mac?
The closest to what you want is to use the Hot Corners feature of macOS. More specifically:


Go to Apple > System Preferences...
Select the Desktop &amp; Screen Saver preference pane
Click on the Screen Saver tab
Click on the Hot Corners... button
Now choose the "Desktop" option from the drop-down menu for the bottom right Hot Corner
Exit System Preferences


Now all you need to do is move your mouse pointer to the bottom right corner and your Desktop will appear (no need to click like you do in Windows).