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the Gryphel Project

The goal of the Gryphel Project is to help preserve software made for early Macintosh computers, the computers that Apple sold from 1984 to 1996 based upon Motorola’s 680x0 microprocessors.

Mini vMac

The center of this project - a family of free and open source emulators that allow such software to be used on modern computers


The rest of this project - software for the early Macintosh, links to alternatives to Mini vMac, links to related forums, lists of books, and more.

Latest News :

October 21, 2020 - permanent link

I’ve upgraded the hardware for the Variations Service. It is more than twice as fast, around two seconds to compile a variation. But the main motivation is that having more memory allows having multiple virtual machines (with VMware Fusion). This allows moving away from using a single set of cross compilers, using other compilers with whatever operating system they require in a virtual machine. Which will allow for supporting more platforms, especially new platforms.

Using a newer Macintosh required using a newer version of macOS. Which was the main factor in this taking a while. I’ll skip rants. Actually, in the end, so far it seems this macOS version can run the Variations Service fine. After disabling most of the OS.

October 4, 2020 - permanent link

The latest Development source snapshot fixes a bug where, if the ROM image file that Mini vMac finds is not the desired ROM, but a different valid Macintosh ROM that has been renamed, and the undesired ROM is larger than the desired ROM, Mini vMac would display a “ROM checksum failed” message instead of the “Unsupported ROM” message. This is because Mini vMac loads and computes the checksum of the expected number of bytes, rather than the actual ROM image size. (It is intended behavior that Mini vMac will work if the ROM image file has some extra junk at the end.) Mini vMac now checks that the checksum field at the start of the ROM is recognized, before verifying the actual checksum. Thanks to a bug report for pointing out this issue.

Previous news - News Archive


Thanks to Chris Hanson, David Kuntz, Anonymous, Robert Braun, Robert Anderson, Michael Hix, Patrick Ronquillo, Shawn McKee, Gian-Reto Theus, Ian Miller, Jason Heiser, Jeffry Rollins, Anonymous, Keith Palmer, Mark Hilary Williams, Charles Gascoigne, Andrew Johnstone, Mirko Holzer, Macintosh Repository, Joe Ho, Juan Sanz, Thomas Chan, Villa Vianci di Ceccherini Chiara, Anonymous, Paul Powers, Thomas Harvey, Matti Riikonen, Anthony Allen, Sverre Svenningsen, Ben Rentfrow, Eric DeStefano, Scott Rickard, Matthew Kirschenbaum, Hayden Ganadi, Pascal Kamina, Kustaa Nyholm, Arthur Fritzsche, Doug Bergen, David Watson, John Sutley, Thomas Hemenway, Chaled Schmidt, Austin-Zande Imagery, Alexis Gargaloni, William Sniegowski, Andrew Ego, Richard Hillier, Erik Anderson, Sabine Busse, Francisco José Ramírez Vicente, Chris Royle, Marie Friis, Andrew Gray, Paul Day, RevereWareParts.com, Frédéric Blondiau, Joshua Russell, Ed Brandt, Hans-Josef Leuninger, Mohideen Haja, Christopher Tar, Stephen Fenwick, Ryan Baumgart, Henry Shawcross, Alex Rader, Johannes Bittner, Nathanael Tronerud, Alexis Gargaloni, Joshua Russell, and Mario Spachtholz for sponsoring over 110 days of health insurance.

Thanks to Gregory Christie, Nicholas Rezmerski, James Denton, Janne Tompuri, James Torck, and Anonymous for sponsoring 14 months of web hosting for the Gryphel project.

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