SketchUp 2026 keeps crashing! It crashes repeatedly and won't open at all!

I dare say I contributed to half of the global SketchUp crashes this afternoon! After upgrading to macOS 26 and SketchUp 2026, I’ve never experienced such crazy crashes as I did today. Since this morning, opening SketchUp and creating a new file with a template would lead to a crash, but I could open and edit models by double-clicking an skp file. By noon, even double-clicking an skp file couldn’t open SketchUp; it would crash immediately upon opening, continuously and repeatedly. Crash numbers 1571-1584 were all my contributions! I didn’t keep track of the previous dozens or so crashes. The only thing I did in between was install two plugins, subd and vertex, but I haven’t used them. I’m going crazy—please help me!

You did send in the majority of bugsplats today.

There were two different types of crashing you sent in. For one of those you were the only person with that type of crash. For the other ones there were a few other people who saw that.

One of those people works at SketchUp, and from the description he sent in I can think of something for you to try.

In Finder, choose Go to Folder… from the Go menu. Paste in this path:

~/Library/Application Support/

In there, find the SketchUp 2026 folder, and rename it.

Open SketchUp, and see if crashing has reduced. Let me know how that goes, and I will have follow up steps.

It’s almost midnight for me, so I may not reply for a few hours.

I didn’t rename that folder. What I did was delete TT subd and TT vertex from the plugin directory, which are the two plugins I installed this morning, and then there were no more crashes, allowing me to continue working. However, the crashes in the morning had nothing to do with these two plugins because I hadn’t installed them yet at that time. I’m not sure about the two types of crashes you mentioned, but it seems like they might be related to these two TT plugins. I’ll try reinstalling them when I’m not working. Thanks for your reply, and have a good night’s sleep.

Both of those extensions are ones that have a paid version. If you had used the Extension Migrator to bring them across, something may have gone wrong with the licensing.

Still doesn’t explain the crashing before you had installed them! When you do need those extensions you could try a fresh install of the latest versions.

I am using the paid version. I purchased and installed them around the time SketchUp 2024 was released, but uninstalled them because I didn’t know how to use them. Yesterday, I reinstalled them, not migrating from an old version. The licenses are still there; they might be saved somewhere on my hard drive. However, after installation, the Plugin Manager prompted me that Vertex needed an update, so I chose to update it. It was sometime after this that the crashes began. Last night before going to bed, I reinstalled both plugins with the latest version of Vertex included, and SketchUp did not crash afterwards. It’s really frustrating though. Fortunately, most of the crashes I’ve encountered over the years have happened when opening SketchUp rather than while drawing—those were much worse in earlier times.

So, I think SketchUp should have a feature that clearly informs the user which plugin is causing the crash if it’s due to a plugin issue.

It crashed in a loop again, with the crash number going from 1939 to 1945. When I used the function to Purge Unused, SketchUp crashed. Upon reopening it, it continued to crash. After several attempts, it returned to normal.