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AC26 6002 Upgrade/AC26 will not even open

Duane Meyers

I have been having issues with AC27/Sonoma. So today I backed down to AC26 and noticed there was an AC26 6002 Upgrade so I downloaded it, installed it and now I can't even get AC26 to open. In trying I get the following prompts...

1. That I am not signed in and I have 23 days to use ArchiCAD

2. Internal error found, ArchiCAD will be closed.


I cannot express how frustrating this is when I have work to get out!

Screenshot 2023-11-15 at 6.23.58 PM.jpgScreenshot 2023-11-15 at 6.26.00 PM.jpg


Not early days . . . It was immediately evident when you did the install update.

Also, "local support=useless".


I see AC26 UKI 6002 (update 4) INTEL has been pulled from download (as at 17/11/2023)

Apple iMac macOS Sonoma / AC27UKI (most recent builds)

Eduardo Rolon

See here:

Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08

Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator

It appears all the 600x updates have been pulled. Not before I ran it on 26 INT which now won't open. (It's not the open delay, that is another bug), I get the following error. I can assure you the listed add-on are indeed located in the proper folder. Sorry but this is an embarrassing sh*t show. Between the Sonoma crashes and this debacle Graphisoft quality control appears nonexistent.


Screenshot 2023-11-17 at 11.03.21 AM.png

Geoff Briggs
I & I Design, Seattle, USA
AC7-27, M1 Mac, OS 14.1.1

Hi Eduardo:


Thanks for posting, but for the life of me, I cannot find that subdirectory, unfortunately.


If anyone has used this workaround successfully, please post about it! I set a timer on my watch for 15 minutes to see if it does in fact open after "10-15 minutes"; wish me luck!

Hi all:


I wasn't able to find the "IPC Data" sub-directory noted in this workaround post, but I did fire up AC 26 6002, and it did finally start up - after about 25 minutes. There was no sign of any activity at all, but I just did other stuff, and eventually it popped back up. Just FYI.

For future reference, the last few versions of macOS have hidden the user library. To find it make Finder active and open the Go menu. Now press the option key and you will see Library magically appear. Open the Library and navigate its contents in the normal fashion.

Geoff Briggs
I & I Design, Seattle, USA
AC7-27, M1 Mac, OS 14.1.1

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