@slbaumgartner said:

@m_mortenttt said:

with command "qlmanage -m plugins | grep skp" or "qlmanage -m plugins | grep Sketch" not reset icon to show quicklook. Just with command "qlmanage -r" can reset and show correctly quicklook, but it's for a moment.

It's ok. Thanks for try to help
I hope someone else can help me, or new MacOS Mojave can fix the problem. Thanks

No, those commands won't fix or reset anything, they can just help diagnose what is going on.

Yes, and I have updated the MacOS to Mojave but still does not solve the problem

@slbaumgartner said:

That's the right quicklook handler. Was it displaying correctly when you ran that command? If so, try again when it has failed. Could be something is stealing the URI from SketchUp's handler.

Here's another command to try, that looks a bit wider:

qlmanage -m plugins | grep Sketch

That should return a bunch of URI's that the handler is set for. If any of them point elsewhere than what you got above, that could be the problem.

Beyond that, I have no idea what is happening. Sorry!

with command "qlmanage -m plugins | grep skp" or "qlmanage -m plugins | grep Sketch" not reset icon to show quicklook. Just with command "qlmanage -r" can reset and show correctly quicklook, but it's for a moment.

It's ok. Thanks for try to help
I hope someone else can help me, or new MacOS Mojave can fix the problem. Thanks

@slbaumgartner said:

Most strange! I've never seen that myself. I wonder if there are multiple quicklook handlers registered against the skp file extension?

For starters, you should use 'qlmanage -r cache' to force rebuilding of the quicklook cache. Just 'qlmanage -r' rebuilds the list of generators, but I'm not sure whether it flushes the cache too. You might also try 'qmanage -m plugins | grep skp' so see what is registered to handle skp.

'qlmanage -r' only work for a few moments, that same as the video I suggested above. I try 'qlmanage -m plugins | grep skp' and the answer is 'com.sketchup.skp -> /Applications/SketchUp 2018/SketchUp.app/Contents/Library/QuickLook/SketchUpQL.qlgenerator (2.0 - loaded)'

@dave r said:

What version of Mac OS are you using?

High Sierra, Macbook Pro 2017

I have a problem displaying skp files when quicklook in the mac finder, sometimes it can but sometimes it can't, I try to reset it in Terminal but only run for a while then erorr again. Before I used SketchUp 2017 now I use SketchUp 2018 with the same problem, and this problem is very difficult when searching for sketchup files. Please help me