The new build is a winner. I didn't need to amend the preferences.

Thanks for sharing

Follow up as promised after installing a new security update. Still no luck getting the newer versions to run, but old 2.4 version still works and is sufficient for my needs. If I had more gumption I'd learn how to build from the source code and try kanjitalk755's suggestion, but for know I guess I'...

All my drives are still HFS+. I guess sometimes software updates break the patches, so I ran the post-install tool again to see if that would help. It didn't. I used the v2.4 July 2018 build today w/o any issues, so I'll probably just stick with that for now. Maybe when the next security update come...

The title of my original post is probably unfair to the security update, but I don't suppose there's a way to change that. Thanks to those who confirmed that it is almost certainly just a "me" issue. And, yes, the later v2.4 build does open correctly and seems at least at basic tasks to be...

I'm still assuming something went awry with the security update and hoping to figure out a way to rerun the installer. Everything else on the computer seems to be running okay so far. I booted off a USB stick and ran Disk First Aid and all was fine with the startup disk. Suppose I can try purging ca...

Tried the zap/delete combo, but no luck. ROM file is the same one I've been using for years, but I did double check the name. And, I've never used full screen mode. I downloaded the security patch, but it doesn't seem like I'll be able to try running it again. Unfortunately I've got an old Mac Pro 3...

System Version 10.13.6, Security Update 2020-003. I was using SheepShaver earlier today without issue, but then decided to install the latest security update. After the install, all I get when I boot SheepShaver is a black screen. I've tried all kinds of things to get it going again, but no luck. Co...

Sorry, I guess I didn't word that as clearly as I'd planned. SheepShaver won't launch any further than the blank window when I change the window size in the SheepShaver preferences to anything besides 640x480. So, for example, it wouldn't even get to the flashing disk icon if an operating system was...

Been trying to figure this out for awhile and thought I'd see if anyone here could help. I was using SheepShaver fine under Mavericks, but after updating to Yosemite, the only window size it will open with is 640x480. As soon as I change it from that, it starts to open with the larger window, but th...