Free Classic MacOS software developed by Rainer Petschick


Since the last update of MacDiffs free classic software as provided on this page several years passed. The development of the software was discontinued since 2001 after appearence of Mac OS X. The programming tool as used to develope the software, VIP BASIC (Mainstay), was already retired during millenium. Unfortunately, their is no simple way for translation of the source codes, particularly of MacDiff's more than 60.000 code instructions, to switch to a modern OS X savvy programming language having little available free time. Thus, all of the last years there are low activities from my side, although as I know there a couple of users who has gladly to operate with MacDiff (here I would like to thank to all faithful users of MacDiff and the other tools).

Until 2009, myself I operated with the unchanged code on a G4 in the Classic environment of Mac OS 10.4. After exchange to a new iMac 24" having MacOS X Snow Leopard, or later Lion all Classic support was terminated. But a valuable way to a further use of MacDiff software have been found, an open source project named SheepShaver, who emulates a PowerMac as a Virtual Machine using Classic Mac OS's between 7.5.2 to 9.0.4. SheepShaver is available in a new 2014 build for all newer MacOS X and Windows versions. For installing it, you need an old Mac OS ROM file and an installed Classic system as available on older PowerMacs. For Windows installation you need additionally to install SDL 1.2 Libraries and a GTK +2 Runtime modul. The old Mac OS, the programs and document files are installed in a virtual disk (a document file in Mac OS X). Your data and graphics can be exchange using one shared folder of your OS as installed in the Virtual Machine. The SheepShaver virtual machine is working fine through all newer MacOS X versions, from 10.6 to 10.12 (Sierra).

MacDiff in the Sheepshaver emulation in MacOS X 10.6

MacDiff works fast and fine with the following adjustments of the Virtual Machine settings of SheepShaver: On Mac OS X, use at least 128 MB (virtual) RAM, Windows refresh rate should be "Dynamic", enable QuickDraw Acceleration and check "Ignore illegal instructions" and "Ignore Illegal Memory Access".

Please let me know if you have problems with the installation of the virtual machine and with my software.

If you have a G4 Mac or some older one, you can work in the classic environment of OS X with my software (version 10.4.9 as latest OS X), or with bootable MacOS 7.1.2 to 9.x.


The user-friendly X-ray powder diffractometry analysis tool for Macintosh computers.

Current version: 4.2.6 only minor changes to 4.2.5 - February 19, 2010

MacDiff Info pages:

Latest MacDiff info (English)

More Info to MacDiff (in English) - Weitere Infos zu MacDiff (in Deutsch)

Manuals: English, German (PDFs)

Peak Fitting mit MacDiff (in Deutsch)

Download Links:

MacDiff 4.2.6: The complete package
including MacDiff for PPC, readmes, manuals, databases, Appearance Manager, and test files (6 MB) - it is a Binhex (hqx) document: Please copy the file to the system disk of your Classic Mac OS finder and depack it by using Stuffit Expander.

MacDiff 4.2.2 for 68K Macs (1374 K)
(a test version for older macs - use it at your own risk!)


A collection of tools not only for sedimentologists for Macintosh:

Geological Time Table
Two Stoke's law calculators
2-Theta - d-value converter
Time-Temperature-Index calculator
Log Generator (also available separately)

Current version: 1.1.3 (1998)

SediTools Info page:

More info about SediTools
(including GIFs of screenshoots showing the main features)

Download - (self extraction applications on a Classic Mac OS)
Download Links:

SediTools for Power PC, Version 1.1.3

SediTools for 68k Macs, Version 1.1.3


_________________Log Generator_________________

A tool used to construct log graphics on the Macintosh.

Current version: 1.1.3 (1998)

Log Generator Info pages:

More info about Log Generator
(including GIFs of screenshoots showing the main features)

Download - (self extraction applications on a Classic Mac OS)
Download Links:

Log Generator for Power PC, Version 1.1.3

Log Generator for 68K Macs, Version 1.1.2

Load an EXCEL spreadsheat to look into Log Generators data structure.



Digitize source data from cartesian, ternary, or polar plots on the Macintosh.

Current version: 1.3.0 (December 21, 2000)

QuickTrace Info pages:

More info about QuickTrace
(including GIFs of screenshoots showing the main features)

Read the German PDF Manual

Read the English PDF Manual

Download -
(please install using Stuffit Expander on a Classic Mac OS)
Download Links:

QuickTrace for Power PC + 68K Macs, including manuals in English and German, December 21, 2000) (1456 K)



Webmaster, Fr. 21.07.2017 11:50