https://appleinsider.com/inside/macos-sequoia/tips/how-to-install-app-store-apps-on-an-external-ssd
pple’s macOS Sequoia now lets you install apps on external SSD drives instead of taking up space on your internal one — but it doesn’t tell you this, so here’s how to do it.
Even with the latest Macs all starting at with at least 256GB of SSD storage, that space fills up fast — and you can’t upgrade it later. What you can do is add external storage, whether that’s for more space or to have an emergency external boot drive.
Now Apple has added a new option to the Mac App Store that means you can use external drives for apps. Previously the Mac App Store app would always install the app to your boot drive, but now it’s up to you…
However, there is an important caveat. This new feature is explicitly meant as a space-saving one, and so it only applies to apps that are larger than 1GB in size…
