Apple - Time Machine progress from the command line
While the backup is running, detailed information gan be gained by
tmutil status
which should return something like this:
Backup session status:
{
BackupPhase = Copying;
ClientID = "com.apple.backupd";
DateOfStateChange = "2014-12-18 14:14:21 +0000";
DestinationID = "B4AF88-5AD5-49BE-B254-650B44E20499";
DestinationMountPoint = "/Volumes/TimeMachine";
Percent = "0.852581430477103";
Progress = {
TimeRemaining = 0;
"_raw_totalBytes" = 38596759;
bytes = 36563200;
files = 480;
totalBytes = 42456434;
totalFiles = 480;
};
Running = 1;
Stopping = 0;
"_raw_Percent" = "0.9473127005301144";
}
If you only care for the percentage, try the following (looks ugly, works only if there is a percentage to display):
tmutil status | awk '/_raw_Percent/ {print $3}' | grep -o '[0-9].[0-9]\+\(e-[0-9]\+\)\?' | awk '{print $1*100}'
To get only the percentage value:
tmutil status | awk -F'"' '/_raw_Percent/ {print $4*100}'