It’s far too easy to clutter up your Mac’s menu bar with clutter. This can be a problem on modern MacBooks, which have a notch in the middle of the menu bar for the webcam: install too many apps and you’ll run out of space. That, and a universal hatred of clutter, is why there are plenty of apps to clean up your menu bar, but those apps can also cause problems. Some apps don’t launch consistently when you launch them, and they’re also a piece of software that’s constantly running on your device.
How to Customize the Menu Bar and Control Panel in macOS | Add or Remove Icons, or Hide the Bar
A free application called Menu Bar Spacing from developer Sindre Sorhus avoids all of this by changing the spacing between menu bar icons. Even better, you don’t have to keep the application running all the time to keep the change. It changes the spacing at the system level, so you can launch it once and never have to open it again.
To get started, download and install the app. You can drag the slider to adjust the number of pixels between icons.
The change will take effect immediately, but please note that all of your applications will need to close and reload (in theory they should all reload automatically, but I had to restart a few manually).