Mac OS Big Sur Issues

[privacyspamisbad]

Hello!

I've been a Fusion lover on my Macbook for ~3 Years now or so, really do like it. Its perfect for me as a hobbyist/maker to tinker, engineer and such 🙂

However last Week I finally updated to Big Sur, and everything worked just fine, as always, the System runs great and Fusion had no issues at all, shorty after that (in the last 4 Days ish) I got pushed a Fusion update, now since that it wont run on my Mac anymore 😞

I am also using it on a Windows machine, works fine there still. By now I unsintalled Fusion 4x with the provided "Remove Autodesk Fusion 360.app", which seems to work (there isnt any info like "yo we done removing", it just disappears). And I removed all the plist Files and Directories listed here.

The "Automatic Cleaning Tool" did NOT work, I was not able to get it running on Big Sur, either it fails with "You dont have persmission" (which I certainly do have).. or when I chmod it, then it starts right into a crash. Yes, I did use "The Unarchiver".

Screenshots of the Error Messages are below.. I seriously have no idea by now anymore.. and I would like to keep using Fusion, especially since we are about to buy a License for work.

I hope some genius can help me out here.. 🙂

Thanks!

[Phil.E]

Have you tried the advice in this article yet?

https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Sor...

[Phil.E]

Before you wipe them out again by reinstalling, can you please make the error messages appear again and gather logs?

After making the error happen

Be sure Fusion is closed

Gather any log files you can find using these instructions

Zip together and post here

[Anonymous]

I have exactly the same problems. It is becoming infuriating.

I have updated recently to big sur. I reinstalled fusion because my hobbyist version "had expired" and fusion would not let me log in. After reinstalling, nothing worked at all. Fusion kept crashing after installing. Whenever I could get into the app I would get the error described here https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Sor...

The fix didn't fix anything at all.

I cannot run the Fusion 360 Cleaner.app It says i dont permissions to open it (!!). Reinstalling didn't either and made things worse. It now doesn't open at all. I just see the icon in the dock and have to force quit.

I am totally stuck

Any suggestion?

[Anonymous]

Here are the log files

[Phil.E]

Hi,

@Anonymous 

Did you do a full clean uninstall? 

• When your hobbyist license ran out that would not block you from logging in. The ability to log in is not tied to the term of your license.
• It sounds like after that you may have done a needless re-install that resulted in some left over files that could cause problems.
• It's recommended to do a clean-uninstall and try again.

[Phil.E]

Are you using a proxy and have you tried the instructions here?

https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/How-t...

[michaelnelson123]

I also had a permissions problem running the cleaner app. This command fixed it:
chmod 755 Fusion\ 360\ Cleaner.app/Contents/MacOS/cleaner

[michaelnelson123]

I am also seeing fairly frequent crashes since upgrading to Big Sur. I uninstalled, ran the cleaner app, and reinstalled and still having problems. I'm not able to do any real work with complex designs. 😞

[Phil.E · Accepted solution]

Thanks for sending in all those crash reports. It's the same problem each time.

From the report it looks like your machine is running out of available memory. This could be a CPU/RAM issue or may be related to graphics. At this time I'm looking for more information to help solve the issue, namely to determine if Fusion 360 is either contributing to a Big Sur (memory) problem, or if Big Sur is exposing a Fusion problem. This doesn't happen in other macOS. 

There is a technical response being prepared for the crash reports, a message to send to customers like you. This is the information it will contain. Can you please try this and let me know if it helps?

Issue Statement: Fusion 360 crashes on MacOS Big Sur due to heavy memory usage
Cause:  The CPU drivers on your machine are experiencing heavy usage, and has run out of free memory

Environment: MacOS Big Sur 11.X
Solution: 

1. From spotlight, search and open Terminal
2. Copy the following, paste it inside Terminal, and press Return
   1. 'launchctl setenv NEUTRON_CHROME_DISABLE_GPU "1"'
3. Launch Fusion 360

Outside of this graphics setting, something else to check is to look at CPU/RAM usage on the machine when Fusion is running poorly.

(Ref: FUS-77575)

[michaelnelson123]

That fixed it. Thanks so much!

[michaelnelson123]

I'm still getting occasional crashes. I've tried watching memory usage in Activity Monitor and I've shut down other large memory users, i.e. Outlook and Cura, and that hasn't seemed to make much difference. Any other ideas?

[Phil.E]

Did you see any unusual results such as:

Without Fusion running, are you low on RAM?

Does Fusion consume unusual RAM?

Is there other heavy CPU activity while Fusion is running, is it different with Fusion not running?