OneDrive Files On-Demand helps you access all your files in OneDrive without having to download all of them and use storage space on your device.
When you turn on Files On-Demand, you’ll see all your files in Mac Finder and get new information about each file. New files created online or on another device appear as online-only files, which don’t take up space on your device. When you’re connected to the Internet, you’ll be able to use online-only files like every other file on your device.
Let's try it out.
Before you begin
To try Files On-Demand for Mac, you'll need to do the following:
Update your operating system to the latest version of Mac OS Mojave 10.14. You can download and install Mac OS Mojave from the Mac App Store.
If you've been using OneDrive on your Mac already (it's not a new account), quit OneDrive, delete the json files (*.json) in ~/Library/Caches/OneDrive, and then relaunch OneDrive.
Download and set up OneDrive
Download and install the OneDrive Files On-Demand for Mac Preview build.
For new OneDrive accounts on Mac OS Mojave, Files On-Demand is turned on by default when you set up OneDrive. Existing users need to turn on Files On-Demand in OneDrive Preferences.
Once Files On-Demand is turned on, you'll see the following new options when selecting files or folders in Finder.
If you don’t see the options above, you'll need to relaunch Finder:
Press and hold the Control and Option keys.
Click Finder in the Dock.
You can also relaunch Finder from the Force Quit dialog box:
Launch Force Quit from the Apple menu (or press option + command + escape).
Select Finder and press Relaunch.
Note: OneDrive Files On-Demand requires an Apple File System (APFS) formatted volume for syncing files. If you've been using a previous file system, it will be automatically updated when you upgrade to Mac OS Mojave.