For example, depending on how you want to listen through, select an appropriate device such as iMac Speakers, Internal Speakers, your external speakers, Display Audio, or USB speakers.

Ensure that the correct sound device is selected.

You'll see two tabs in the lower-left corner: Mac Volume and Boost File. You may want to adjust the slider to 50-75% of its full range. Click the button below Boom's vertical volume slider to open Boom's control panel. There arent any legit volume increase apps. But this will only increase the volume in Itunes.And on most occasions the sounds will be a little distorted.

On your Mac, go to System Preferences, click Sound, then click Output. For Itunes you can double the volume by going to windows > equalizer and raising all frequencies to max.

If they have a volume control knob or control, ensure that the volume is turned up or properly set.

If it is a USB device, ensure that you use the USB port. Ensure that the speaker cable is securely plugged into the “audio out port” on your Mac. If you are experiencing this problem with external speakers, ensure that they are turned on and connected properly. The Windows volume control (and checked the mixer to make sure system sound and individual apps are maximized), and using the F12 key to make sure the system volume reads fully maximized.If you are experiencing this problem when using a particular app, ensure that the volume level in the app isn’t low or muted as several apps have their own audio and/or video volume settings.For example, there may be a setting that needs to be changed. The first step is to check these basic steps. If you are using external speakers, try cleaning them out.If you are using Bluetooth devices (speakers or headphones), ensure that Bluetooth is enabled on your Mac.Quit all apps to see if this makes a difference.

You can do so by going to System Preferences > Software Update. Update your Mac to the latest version of macOS.MacBook do not allow the user to control external speaker which is embedded in an external monitor. You can restart your Mac by going to the Apple menu > Restart. This is a well known limitation across macOS MacBook systems.

Increase volume in macbook pro