MAS stands for "Mac App Store", which is Apple's official digital distribution platform for macOS applications. TNTDMG is likely a reference to a notorious group of crackers known for releasing pirated software.
: This could stand for "Mac App Store," suggesting that the version of Logic Pro X being discussed is one available through Apple's Mac App Store. Apps from the Mac App Store are often verified and sandboxed for security. logic pro x 1050 mas tntdmg verified