This little window first goes through a phase of verifying the file, and then once it’s sure the file is good, moves on to decompressing it. This is what you see when the file is opening: DMG files include something called a checksum, which basically verifies that the file is 100% intact. Click the lock icon, enter your password, and set the “Allow apps downloaded from” option to “Anywhere.” This will reduce your security as it allows unsigned apps to run, so be sure you know what you’re doing if you use this option.The main reason macOS uses DMG files is to make sure the file downloaded properly and wasn’t tampered with. To disable Gatekeeper, open the System Preferences window-click the Apple icon at the top-left corner of your screen or click the System Preferences icon on your dock-and click the Security & Privacy icon. If you’re absolutely certain the application in question is trustworthy, you can open apps from unauthorized developers by holding Option, right-clicking the application, and clicking “Open.” You can also disable Gatekeeper entirely, if you so choose. RELATED: How to Open Apps from 'Unidentified Developers' on Your Mac This is a security feature called “Gatekeeper”, intended to stop the spread of malware and other unwanted software, but every once and a while a program you want to run fall into this category, showing you a message like saying your program “can’t be opened because it is from an unidentified developer.” How to Bypass Gatekeeper and Run Applications From Unidentified Developersīy default, your Mac won’t open any software made by “unidentified developers”. Even some smaller companies avoid the Mac App Store for this reason. Apple gets a cut of all sales in the Mac App Store, and companies like Microsoft and Adobe don’t like that, which is why Microsoft Office and Adobe Creative Suite won’t be in the Store anytime soon. Pretty much any application that customizes macOS can’t run in a sandbox, which is why you’ll have to look elsewhere for tools like Dropbox, which by definition need to work outside the sandbox in order to function properly. First: apps from the Store are sandboxed, which is great for security, but limits what applications can do. Still, you probably won’t install all of your software this way, because the App Store doesn’t have all the applications you want. RELATED: Why the Mac App Store Doesn’t Have the Applications You Want

Updates are all handled by the store, which is convenient, and any application you purchase on one Mac will work on another. Your application will download and show up in your “Applications” folder. Open the store, search for the app you want, and click “Get” then “Download.” Still, the Mac App Store is a decent first place to check. We’re all used to app stores on our phones, but on the desktop they remain an oddity.

Mac App Store: Click a Button to Install an App

Chrome dmg file