Performance on macOS Catalina is erratic.

[Anonymous]

I am having an erratic performance issue running Fusion 360 on macOS Catalina (running on a 2020 MacBook Pro 16" with the 2.4GHz 8 core Intel Core i9 processor, 32GB of ram, and AMD Radeon 5500M Pro GPU). I've performed a clean install of macOS, as well as Fusion 360 (before reinstalling macOS using the bundled uninstaller).

The issue I'm having is that occasionally Fusion 360 will freeze with the macOS rainbow spinner (application not responding). While this happens, the CPU usage of the machine is nearly zero. I've tried disabling all of the graphics options which only results in the visuals looking poor.

The design I'm working on is somewhat complex, but it is handled fine on a seperate Windows machine AND on a Windows virtual machine on the same MacBook Pro I'm having issues with.

[TrippyLighting]

Can you share the design?

[Anonymous]

I don't see why not. I'm not sure how though.

[TrippyLighting]

Yo u can share the public link:

[Anonymous]

I'd rather not share it publicly. 

[Anonymous]

This happened again tonight. I managed to get Activity Monitor to save a spindump which I've attacjed.

[Anonymous]

It seems to happen most often when I'm creating or editing a rectangular pattern feature.

[jeff_strater]

This is not "erratic" performance.  My guess is that you have a large pattern.  Large patterns will be slow to compute.  The larger and more complex they are, the slower they will compute.  Hopefully, you are not using sketch pattern, which is even slower.  If you are using Feature pattern, make sure the type is not set to "Adjust".  Adjust feature patterns can be 10x slower than "Optimized" feature pattern.  Even using optimized, though, if the pattern is large, compute will be slow.

[Anonymous]

I should have been more clear when I mentioned it happening during creation of a rectangular pattern. Specifically, the spindump I provided above occurred when I had clicked on the rectangular pattern tool, and selected a single hole feature. I had done NOTHING more, not even selected a direction. I'd also like to reiterate that this doesn't happen on windows, and that it sometimes occurs during other operations besides rectangular pattern (I've seen it occur at least once simply by doing an orbit).

[Anonymous]

Hello,

I own a MacBook Pro 16" i9, 2.4GHz, 32Gb ram, 5500 8Gb, running Catalina 10.15.5.
Although Fusion is much faster than on my MacBook Pro 2010, I have an issue when I come back to a sketch or extrusion in the beginning of the timeline.
The further I move forward on the timeline, the slower the sketch is re-editing.
I can see that for the same sketch, the re-editing is as slow with my MacBook Pro 2020 as with my MacBook Pro 2010.
So a single click can generate the multicolor wheel for at least 20 seconds.
When I want to rework extrusions, it's as slow as hell and the work becomes extremely laborious.
Finally, when I go back on an extrusion, the extruded faces are sometimes lost or don't correspond anymore to what I had done, forcing me to redo everything after each edition, adding to that the slowness of each action, the file becomes unusable.

[TrippyLighting]

And you have a model you can share and a screencast, which demonstrate the problems?

[Anonymous]

Hello and thanks for reply

Here is my share file

https://a360.co/3fD3moq

[TrippyLighting]

@Anonymous Your sketch is not fully constrained and that the reason for the performance problems when sketching.

You are patterning bodies instead of components. That means you are creating more geometry instead of creating instances of the same geometry. This is very simple geometry and it is unlikely to create performance problems, but creating a cut list is only going to work with components.

If you create individual components from all the bodies your BOM us going to have many identical components with an instance counter of 1 instead of a single line item with a proper number of instances.

[curtVJ5LW]

Might be unrelated, but I've recently started using Fusion again in the past month, and I was forced to download an entirely new personal version (fine), and I'm seeing a lot of points where Fusion just becomes unresponsive.  MacBook pro, older 2017 version. I will take many seconds to respond to any mouse click.  When I check the activity monitor, there's always a "spindump" running at 100% cpu (for one processor).  Just now, all I did was launch fusion, selected "new electrons design", "add part", then started using the dialog to search for a battery or a "power" part, and clicked through the list.  Suddenly this lock-up happened again, and I realized the interface was slowly responding to mouse clicks I made many seconds in the past.  Check Activity Monitor and there's a spin dump running.  Once the spindump is done running (maybe 30 seconds?), performance returns.  I've seen fusion trigger one of these spindump events maybe 20 times.  Any hints about why it keeps doing this?  Doesn't a "spindump" imply something crashed?  Feels like fusion keeps crashing on me, making it very hard to actually use the tool at times.  Mac OS Big Sur, 11.5.

[Anonymous]

Hello, On a MacBook Pro 16" Fusion 360 remains excessively long to open, it is slow. Moreover, nesting has become paid even for beta testers, what a shame! The micro enterprise version is too limited, I found a solution, I uninstalled Fusion360, no more for me. I now use Polyboard, Optinest and Vectric and everything works great, much more effective and efficient. I'm glad I changed.

[curtVJ5LW]

I fixed my problem. I have no idea what was causing it. All it took was a reboot. Wasn't related to fusion. But every time I touched the CAPS LOCK key, the windows manager would have a huge spike in CPU for multiple seconds and the windows interface would lock up while it was having that problem. Apparently, this same issue triggered a spindump with Fusion.

I've got the CAPS LOCK key set to be ignored in the Mac Preferences because I never use it and constantly hit it by accident but instead of ignoring it, it was somehow triggering this bug. Turned it back on, rebooted, and it went away. Then set it back to ignore.

I thought it was fusion-related because I saw the problem all the time when trying to use fusion because of the many keyboard shortcuts I use in fusion I kept accidentally touching the CAPS LOCK key. In normal message typing, I don't hit it so easily. So it seemed to be a fusion bug when in fact it was some odd Mac bug.

Maybe it was somehow related to installing a new version of Fusion, and doing the OS upgrades while having the key set to ignore? I have no idea. But a simple reboot fixed it.