Hi Eric, I don’t think that is the case.
When you (or it automatically) selects the OS type, it should make all of the necessary changes. I did go thought the settings trying a bunch of non-default items. Nothing made a difference for those programs causing it to terminate the machine. The default settings work fine on my older Dual Core i5 MacBook Pro running macOS 10.13.6 and is limited to VirtualBox 6.1.42. No problem with those programs in FreeDOS. So, I tried the following on the 8-Core Trash Can MacPro running Monterey (macOS 12.7.6)... Removed VirtualBox 7.1.2, Installed VirtualBox 7.0.20. Recreated FreeDOS virtual machine with default VM settings. Same problems with DOS programs mentioned. Removed VirtualBox 7.0.20, Installed VirtualBox 6.1.50 (no longer supported by Oracle). Rebooted machine for kernel extension installation. Recreated FreeDOS virtual machine with default VM settings. No problem with any of those programs. Removed 6.1.50, Installed 7.1.2, Rebooted. Ran existing FreeDOS VM. Problems recurred. Rolled back to 6.1.50. Rebooted again for kernel extension. Ran existing FreeDOS VM. No problems. Therefore, I don’t think it has anything to do with the settings in VirtualBox. But, it is possible that there are settings not in the user interface (only in config files) that could be causing a problem. But, when selecting the machine as DOS, it should make those changes automatically. 6.1.x installs a kernel extension, 7.x does not seem to do that. Possibly that is the problem under a DOS client. Interestingly, the Virtual Display is noticeably slower when using 7.x. It is also possible that there is some sort of compatibility (or setting) causing issues with this version of macOS or even the model of CPU. I wonder if anyone running a newer version of macOS is experiencing the same problem with VirtualBox 7.x. For now, I just rolled back to VirtualBox 6.x. :-) Jerome _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel