Two iPhones, two Apple IDs, one Mac library/ID

I’ve seen variations of this question but I’m not clear on the answer, especially with the new ‘no iTunes’ catalina.


I know I can set up my MacBook with a separate user so they can sign in with their own Apple ID and set up their own app data to sync to their iPhone. But just for the record:


say I instead set up my MacBook under my Apple ID, syncd and backed up my iPhone (same Apple ID as the MacBook). Now say I plug in my friends iPhone—with a different Apple ID—and click sync and then backup.

what would happen?


i ask cause would prefer doing this to creating a separate user for them.

MacBook Pro 13", macOS 10.15

Posted on Jan 2, 2020 8:49 PM

Reply
2 replies

Jan 3, 2020 7:11 PM in response to Barney-15E

thanks.


a little more of what I’m planning.. if others and you (again) can weigh in...


1) both phones were previously syncd to iTunes on a pc under two different user logins


2) the MB will be logged in my Apple ID with manually built music, photos, tv, etc. libraries (choosing not to import iTunes folder/media from the pc).


3) I’ll sync my phone (it’ll warn of certain data being erased).


4) I’ll sync Their phone. It’ll warn of being erased. But when I proceed what else might screw up her or my Apple accounts/ID, etc.


in other words, will something get corrupted because her phone/Apple ID is different from the Apple ID associated with the MB and the apps that will sync their data to the phone?


im thinking, at the least, something harmless like my purchased music not transferring to her home as I’d expect; but what’ve something more damaging/detrimental? Like her phone’s (or my) Apple ID, phone name/number and iCloud data getting mixed up/corrupted/‘lost’; or my MB’s iCloud/Apple ID, device names/numbers etc.


anyone have any idea if catalina’s apps’ syncable data is smart enough to simply sync the allowable data, like personal music, photos, videos, and not sync non allowable data like purchased books, photos, videos etc.?


im just trying to avoid building and maintaining two separate sets of syncable libraries under two logins, like I did for years on the pc.



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Two iPhones, two Apple IDs, one Mac library/ID

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