Both Synology and FreeNas can act as a TimeMachine Server to backup any macs you have and typical programs can be used for backup - rsync, rsnapshot, borg, duplicity, etc. I believe Backblaze has. Borg was open-sourced in 2010 and is supported by a large community of developers. We are also sponsoring development of the open source Vorta desktop GUI for Borg, as well as other Borg-related projects. Check them out on Github.
What is the problem you are having with rclone?
Maybe this is not a problem but instead a SOLUTION to a problem: I was plagued by extremely low upload speeds (around 100 KB/s) for several years when syncing borgbackup repositories to Backblaze B2. My problems were previously described in the (now locked) forum thread here. The underlying cause was found to be lots of 503 errors being throws by Backblaze while Backblaze support assured me that everything is OK at their end. None of the proposed solutions (e.g. increasing the --transfers value) worked.
Recently I have found that simply adding the '--fast-list' option to rclone command increased my upload speeds from around 100 KB/s to at least 2 MB/s (sometimes up to 5 MB/s). That's at least 20x speed increase ant it's absolutely consistent (tried 5 times without the --fast-list option and 5 times with it). I don't know if this is a bug in rclone or at Backblaze's end but this info might help other afflicted users.
N.B: My borgbackup repositories consist of multiple long files (up to 500MB) and many more short 17 bytes files (for snapshots that did not change compared to the previous snapshot). The typical file composition of my borgbackup repository can be seen here.
What is your rclone version (output from rclone version)
1.52.0
Which OS you are using and how many bits (eg Windows 7, 64 bit)
Xubuntu Linux
Borg Backblaze Electric
Which cloud storage system are you using? (eg Google Drive)
Backblaze B2
The command you were trying to run (eg rclone copy /tmp remote:tmp)
The rclone config contents with secrets removed.
Borg Backblaze 1
Mackeeper scam. EDIT: Fixed missing 'sync' directive in the command.