So basically the Universal app you need to download is 6GB instead of 3GB (and it also will occupy 6GB on your system). It's OK for small apps but some exceed 3GB (Ableton Live for example). But sadly it also goes with double file sizes too. In addition to the above, iMazing has released a free app that scans your macOS apps and displays their supported CPU architecture, while repo offers a free menu bar app called Silicon Info that lets you quickly view the architecture of the currently running application. In addition to the System Report list, you can check individual apps too: right-click an app's icon in Finder, then select Get Info from the contextual menu and look at its Kind under 'General.' In the Applications list that loads, look under the Kind column to see whether an app is a Universal binary or a non-native Intel executable.

In the System Report window, select Software -> Applications in the sidebar.

In the 'Overview' tab, click the System Report.

Click the Apple symbol in the top-left corner of your Mac's menu bar and choose About This Mac.

Even when emulating x86 code under Rosetta 2, the Macs with Apple silicon generally run non-native apps faster than Intel-based Macs, but it's good to know which apps have been optimized for the advanced hardware inside your M1 Mac. If an app has yet to be updated to Universal 2, an Apple silicon Mac will still run it, but it will do so by converting the Intel x86-64 code using Rosetta 2 emulation software. At WWDC 2020 in June, however, Apple announced Universal 2, which allows apps to run on both Intel-based Macs and Apple silicon Macs.

Originally, Universal apps referred to executable files that run natively on both PowerPC or Intel Macs. When developers update their apps to run natively on Apple silicon, they use something called a Universal binary. But how do you know which of your apps are running natively as Universal executables and which ones are using Rosetta emulation? Read on to find out.

Even if an app hasn't been updated, Apple's non-Intel Macs can still run them, thanks to Apple's Rosetta 2 translation layer. Following the launch of Macs powered by Apple silicon, numerous third-party apps have been updated to ensure they are optimized to run on Apple's custom processors.

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