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That said, there are reasons why you may yet prefer the MAS app. It will typically either trigger a message asking for your Apple ID/password or simply refuse to launch with no alert given. Most notably, after copying an MAS app to a different computer via the Finder, it likely won’t launch. With MAS apps, you will likely run into various copy-protection problems - even with freeware. For the most part, they will immediately and successfully launch, just as they do on the originating computer. The main one is that you can freely copy non-MAS apps to any other computer with no restrictions - especially so for freeware. MAS versions of appsĪssuming you have a choice, there are reasons to prefer the non-MAS version of an app as compared to its MAS twin. This has nothing to do with MAS receipts. #APPLE APP STORE FOR MACBOOK AIR INSTALL#Techie note: When you install any software on your Mac, a receipt is often placed in the /var/db/receipts directory. Instead, the app will refuse to launch anymore. ![]() In case you’re wondering: No, deleting the _MASReceipt folder from the app will not remove its copy-protection. Further, if a developer fails to implement receipt checking properly, users may be able to “pirate” a purchased app (as has been covered in this TUAW article). As a result, exactly how an app responds to copy-protection challenges will vary depending upon how the developer decided to handle receipt checking. The gamut runs from essentially no checking (eliminating any copy-protection) to checking multiple times while the app is running. #APPLE APP STORE FOR MACBOOK AIR VERIFICATION#If the result does not match the hash in the receipt, verification fails.” In other words, the receipt file is modified when you first install the app from the MAS this is what allows the app to validate and run on your computer.Ī developer has the option to decide the extent of receipt checking for an app. The last is to compute the “hash of your computer’s GUID. The first check is to simply look for the receipt. Non-MAS apps do not have this receipt checking.Īccording to Apple’s Developer documentation, there are five checks that an app can perform. When you launch an MAS app, the app checks the receipt to see if your computer has been authorized to run it. Also referred to as a certificate file, this is the essential item for implementing copy-protection. Inside the _MASReceipt folder is a file named receipt. This is the key difference between MAS apps and non-MAS apps. In the list that appears, you’ll see a folder named _MASReceipt. To do so, access the Contextual Menu for an MAS app and select Show Package Contents. To find the answer here, you need to peer inside an MAS app. MAS versions of apps: What’s the difference? #APPLE APP STORE FOR MACBOOK AIR MAC OS X#How exactly are MAS apps different from other apps? How do the App Store and Mac OS X treat the distinctions? What Mac OS X software handles recognizing these differences? Perhaps most importantly, if you have a choice between an MAS and non-MAS version of the same app, which should you prefer? Read on… For example, using the Finder, you can copy a non-App Store app from one drive to another and it will work the same in both locations. Mac OS X can similarly tell if an app came from the Store or not. ![]() #APPLE APP STORE FOR MACBOOK AIR UPDATE#The Store app will offer to update MAS-acquired apps but not the same app acquired outside of the Store. Even if an MAS app is an apparent duplicate of a program you previously downloaded from the Web or installed from a disc, the apps are not exactly the same.Īs such, the Mac App Store app can recognize if an app was acquired from the Store. Apps you install from the Mac App Store (MAS) are different from other applications on your drive. ![]()
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