source of problem
In the Mac Finder, it is usually encountered that the system freezes and the mp4 video format files and photos cannot be previewed.
Solution
Open Launchpad and find Activity Monitor in Utilities
![[External link picture transfer failed, the source site may have an anti-theft link mechanism, it is recommended to save the picture and upload it directly (img-ipfpBiwt-1678024736573) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212023.png)]](https://img-blog.csdnimg.cn/384b37304b52490b99f9a1fe6ff0393b.png)
Or directly open the focus center input activity monitor through command+space (space bar)
![[External link picture transfer failed, the source site may have an anti-theft link mechanism, it is recommended to save the picture and upload it directly (img-69hz5zop-1678024736575) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212228.png)]](https://img-blog.csdnimg.cn/4045a4d297cf4f2680863576fcf042e2.png)
In Activity Monitor, type thum into the search box in the upper right corner and find the following processes
![[External link picture transfer failed, the source site may have an anti-theft link mechanism, it is recommended to save the picture and upload it directly (img-b5bjZ2SH-1678024736575) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212333.png)]](https://img-blog.csdnimg.cn/3fc313f05aea43c6ac751349b243f0c1.png)
Select the process and click the cross
![[External link picture transfer failed, the source site may have an anti-theft link mechanism, it is recommended to save the picture and upload it directly (img-prK899rP-1678024736575) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212437.png)]](https://img-blog.csdnimg.cn/55bc62d203f94cd2a616ed41cfafc075.png)
Opt out, or if you can't, select Force Quit
![[External link picture transfer failed, the source site may have an anti-theft link mechanism, it is recommended to save the picture and upload it directly (img-vxrZ476U-1678024736575) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212454.png)]](https://img-blog.csdnimg.cn/fcb04cbbab6e46f49c19d69c9a52caa6.png)
Hold down the option key and restart the Finder
![[External link picture transfer failed, the source site may have an anti-leeching mechanism, it is recommended to save the picture and upload it directly (img-v9TrrSPb-1678024736576) (/Users/codertutu/Documents/obsidian local warehouse/tutu_vault/Mac system problem/obs_photo/ Pasted image 20230305212553.png)]](https://img-blog.csdnimg.cn/8e87504b59674cf4afef589388a3a565.png)
to restore the preview