"I just wanted to know about the procedure of migration, if that includes Apps on external drives (not talking of anything to do with piracy). Otherwise I might just have to do an installation without migration and add Apps to the External drives one by one. With the basic Mac Mini many will have the problem I have."
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Transferring Items w/o Migration Assistant:
Sync through iCloud:
If iCloud items are enabled then you can just sync data (not full applications) that was. As an example, here is how to do so with photos: Once set up, enable Photos in iCloud on this Mac and your other Apple devices, and see if the data shows up. If your devices have items synced with iCloud on them, then they should pop right up in the finder window.
A. Enable iCloud Photos on an iPhone:
- Go to: Settings
- Tap: Your Name (Top Item)
- Tap: iCloud
- Tap: Photos (so that it is green)
then...
B. Enable Photos on this Mac:
- Go to: System Preferences
- Click: Apple ID (on top-right)
- Select: Photos (by giving it a check mark)
Also...
Note: 32-bit Apps won't Work
Note that 32bit Apps will not work on Catalina and After. So, older apps may not run. To work around that, contact the Developer, requesting a 64-bit installer for it.