Updated September 2026: in 2021 I argued Apple should let Time Machine back up online so that Mac users could stop relying on cables and external drives. Apple has not added cloud Time Machine, so I have rewritten this around the closest thing that works today: backing up over your home network.
My 2021 wish was a Time Machine that backed up to the cloud, with no dongles to carry and no hard drive to damage. That still does not exist. What does exist, and is under-used, is Time Machine over Wi-Fi to a drive elsewhere in your home. It removes most of the hassle I was complaining about.
Can Time Machine back up without a cable?
Yes. Time Machine can back up to a shared network folder, as long as the device sharing it supports Time Machine over the SMB protocol. Once set up, backups run automatically whenever your Mac is on the same network, just as they would with a plugged-in drive. Apple's own wireless option, the AirPort Time Capsule, was discontinued in 2018, so today this means a network drive or another Mac.
What can you back up to?
- A NAS: network storage boxes from makers such as Synology and QNAP offer a Time Machine option in their settings. This is the most common route.
- Another Mac: a Mac that stays at home can share a folder as a Time Machine destination from its File Sharing settings.
- Some routers: certain routers with a USB port can share an attached drive for Time Machine. Check that the router explicitly supports it.
How do you set it up?
On the NAS or sharing Mac, create a shared folder and turn on the option to use it as a Time Machine backup destination. On your Mac, open System Settings, go to General, then Time Machine, click Add Backup Disk and pick the network share. Give it a size limit on shared storage so it does not fill the device. The first backup is slow over Wi-Fi, so run it overnight or over a cable if you can.
Is a network backup enough on its own?
No. It fixes the cable problem, but a backup in the same house is still exposed to theft, fire or a power surge. For the files that matter most, add an offsite copy: a cloud backup service, or cloud sync of your Documents folder with version history. Remember that sync alone is not a backup, because deleting a file on the Mac can delete it in the cloud too.
What should Apple still add?
An encrypted Time Machine target in iCloud, even as a paid add-on, would complete the picture for people who travel. Until then, a network drive at home plus one offsite copy delivers most of what I was asking for in 2021, without carrying a hard drive around.

