Windows

Windows XP (32-bit)

Windows Vista (32-bit and 64-bit)

Windows 7 (32-bit and 64-bit)

Windows 8 (32-bit and 64-bit)

Windows 10 (32-bit and 64-bit)

Intel Mac OS X

Snow Leopard 10.6.x

Lion 10.7.x

Mountain Lion 10.8.x

Mavericks 10.9.x

Yosemite 10.10.x

El Capitan 10.11.x

macOS 

Sierra 10.12.x

High Sierra 10.13.x

Operating Systems that are not supported

Windows

Windows Servers of any type or variety are not supported including SBS

Windows 95

Windows 98

Windows 2000

Windows ME

Windows XP (64-bit)

Mac

PowerPC Macs (G3, G4, G5) are not supported, nor is any version of Mac OS X 10.5 or below.

Mac OS X Server (10.6 and greater) can be backed up, but not all Server specific areas are allowed for backup, hence it is considered unsupported.

Linux, BSD, Unix and other *nix systems.

These operating systems are not supported and Backblaze can not be installed on them.

Alpha, Beta, Prerelease, and Preview operating systems

These operating systems are not supported. While Backblaze may be able to be installed, features, performance and validity of backups may not have been tested.