Thread: sac file extraction

I was trying to extract the SAC file (*.tgz) IRIS sent me and install
SAC on my MacBook Pro. However, two ways to extract files they suggest
in the email didn't work. Here are the error messages:

hr-shuoma-1158617981:/Applications shuoma$ tar zxvf
05Mar01.sac.bin.darwin.tgz

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error exit delayed from previous errors
hr-shuoma-1158617981:/Applications shuoma$ gzip -d -c
05Mar01.sac.bin.darwin.tgz | tar -xf -

gzip: 05Mar01.sac.bin.darwin.tgz: not in gzip format
hr-shuoma-1158617981:/Applications shuoma$

Does anyone know what to do? Is the file corrupted?

Thanks,
Shuo