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Mathcad 6 crashes upon loading?

I installed Mathcad 6 from the Macintosh Garden on my Centris 650 and it crashes when opening. It looks like the program wants to get past the splash screen but can't.

IMG-3637.jpg

The upper righthand corner of the splash screen disappears and the computer hangs here.

I tested this installation on my Windows machine running Basilisk and everything works.

What could be causing a conflict in my Centris installation?

Thanks!
 
Restart and hold shift down while the computer restarts, until you see "Extensions Disabled" then try again. See if it is a system extension.
 
Did that just now and a "Type 2" error pops up now.

View attachment 52590
I'd start by grabbing a different version to be honest. This sort of message usually means someone's uploaded a trashed copy. Technically I think it is :

"error 2 siInitVBLQsErr: VBLqueues for all slots could not be initialized. or dsAddressErr: address error"

But that doesn't tell me much.
 
Oh, one thing, you do have an FPU don't you?

Could you open System Profiler in the Apple Menu and share a picture?

Should look like this :

20230108_115337.jpg
 
Sorry for being out of action here. Had a bit of a COVID to fight off! 😷 🤒

Here's my system's profile.

IMG-3689.jpg

Could the crash be coming from me running OS 8.1? I was thinking of trying to install OS 7.6.1, the last of the version 7 series.
 
Yeah, could be something about OS 8 it doesn't like. Or as Phipli said, a corrupt/bad image of the software. Have you tried Mathcad 3?
 
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