EDIT (after certain issues were resolved):
My MacBook Air ARM was just delivered - I set it up using iCloud BUT, here are my current issues:
MAIL:
iCloud mail keeps stating server has timed out
Gmail (in Mail) keeps stating server has timed out
The above resolved after about an hour and all mail was downloaded
In Mail, there are no universal Junk, Trash and Archive folders, each one is separate
The above was resolved as I had to add those universal mailboxes as "Favorites" by clicking the "+" sign and adding each separately
MUSIC:
None of my songs have synced from iCloud
This is only partially resolved -- Apple support could not figure it out and while I was waiting to be transferred to someone else in the support chain, I saw a setting on my MP 7,1 for Music to Sync libraries -- so, I clicked this and all the iCloud music showed up on my MBA -- however, once I did this, I was forced to download all the iCloud songs onto my MP 7,1 Ughhhhh
DESKTOP/DOCUMENTS:
No thumbnail preview
None of the items will open
The above resolved after about an hour once iCloud finished syncing