clean the System Caches
bambooDelete all the files in /System/Library/Caches and it's subdirectories but leave the directories and the symbolic links intact. This is very important!Reboot.Recreate the kernel cache.Reboot again.
10.15 macOS Catalina 安装第三方软件
MacOS 10.15 Catalina 的系统的安全性进一步提升。 它对第三方软件及未签名软件越来越严格。安装未签名软件时会提示文件损坏，情况之一如下图： 应该在设置里 把允许来源设置一下。然后： It a simple fix and here is how we fix it: Close System Preferences on your Mac.Open the Terminal app from the /Applications/Utilities/ folder.Type the…