iCloud & iCloud Photos · iCloud Drive basics
Will my iCloud Drive files show up on a new Mac?
Short answer: Yes — sign in with the same Apple Account and turn on iCloud Drive (and Desktop & Documents if you used it). Files may appear online-only at first and download when opened; use Download Now for folders you want offline.
Yes. Sign in with the same Apple Account and turn on iCloud Drive (and Desktop & Documents if you used it), and all your files appear. Many may show as online-only at first — they download when you open them, or you can choose Download Now for folders you want offline.
Photos works the same: turn on iCloud Photos and choose Optimize Mac Storage or Download Originals. Apps and files outside iCloud come over through Migration Assistant instead. See what online-only means.