MacBook displays are typically run at a scaled resolution that uses the extra pixels from higher-resolution monitors to improve the clarity of the text on the screen while keeping everything the same size. However, this causes the display to be substantially "magnified", with everything being much larger than it should be.
When the ad runs at its native, unscaled resolution, you have much more room to work with. which may be beneficial for those trying to squeeze every inch of work space out of a smaller MacBook.
Try the built-in controls first
Apple includes some controls that allow you to change the zooming of the display You can find the settings under "Display" in System Preferences:
If you have If you are currently using the default settings, it is probably best to try this out before using a third-party solution.  Using Retina Display with Native Menu
The Retina Display Menu is a simple menu bar app that lets you select a custom resolution from a drop-down list. It's an older app, but there are no issues with macOS Mojave. If it does not work in the future, you can try SwitchResX, which was recently updated but is a paid app.
Download and open the DMG file for the app using the publishing link at the bottom of the app page. The icon in the menu bar lets you choose which resolution you want to perform.
With RDM you can run higher resolutions than your native display, but they will be out of focus as it will interpolate. Here my 13 "MacBook has a native resolution of 2560 × 1600, but can scale closer to 4K. It does not look very good, though, and may be too small to even read. Therefore, it is best if you keep your native resolution. You can find your native resolution on the "Display" tab in "About This Mac".
RDM supports the simultaneous support of multiple displays and even changing the refresh rates of high refresh rate screens, but may be limited on older displays DisplayPort cable.
However, it is not without mistakes and inconveniences. Even if you start the app at startup, your default resolution will not load, so you'll need to manually select it. If you use multiple monitors, each time the secondary monitor is disconnected, the MacBook monitor reverts to the default settings and you must reselect the resolution. Sometimes an error occurs and you have to select the resolution twice. Overall, it does its job quite well.
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