1) Download EXAFSPAK disk image from the
link above. 
Open it by double-clicking the
downloaded file.
You should see Folder
containing:
• Install EXAFSPAK
• README.txt
• EXAFSPAK_manual.pdf
2) Download and install the XQuartz
X-window app.
https://www.xquartz.org
Remember you
must log out and log back in again before it will work
properly.
3) Double-Click the "Install_EXAFSPAK" Icon
This will install
EXAFSPAK in your home folder. It will warn you
if there are any problems.
Eject the downloaded disk image
4) Test EXAFSPAK by opening a NEW Terminal
Window and typing
process -v -h
which should print the
version and help screen. This should look
something like this:
Process
Built : Sun Mar 08
23:52:51 2026
Hostname : Artemis
OS :
macOS 26.3 (arm64)
Compilers : Apple clang version 17.0.0 (arm64)
: GNU
gfortran, gcc version 15.2.0 (aarch64)
S-Win
Version : Sun Feb 23 18:53:44 2025
Built : Sun Mar 08
23:52:47 2026
Hostname : Artemis
OS :
macOS 26.3 (arm64)
Compilers : Apple clang version 17.0.0 (arm64)
: GNU
gfortran, gcc version 15.2.0 (aarch64)Process
Usage: process FILE [OPTIONS]
Options:
/automatic
/device[=<arg>]
/dumb
/help
/logfile[=<arg>]
/nobell
/recover[=<arg>]
/route[=<arg>]
/xwindows=<arg>
Options can
be denoted by "-option" or "/option"
If you are running on an
Intel Mac, you will see a different version and
compilers.
5) Congratulations! You have
successfully installed EXAFSPAK on your Mac.
Thank you!
Contacts in case of Problems
For macOS specific problems (including this
website), contact Simon George: simon@simonscientific.com,
sjgeorge@seti.org
For EXAFSPAK specific questions, contact Graham
George: g.george@usask.ca
Latest Update: 13 March 2026
