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clean the System Caches

  1. Delete all the files in /System/Library/Caches and it’s subdirectories but leave the directories and the symbolic links intact. This is very important!
  2. Reboot.
  3. Recreate the kernel cache.
  4. Reboot again.
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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:

  1. Close System Preferences on your Mac.
  2. Open the Terminal app from the /Applications/Utilities/ folder.
  3. Type the following command syntax:
    1. For a certain application run in Terminal:
      sudo xattr -r -d com.apple.quarantine /path/to/Insall.app
    2. To disable checks globally run in Terminal:
      sudo spctl --master-disable
  4. Hit enter on your keyboard.
  5. Enter your administrator password.
  6. Hit enter on your keyboard.

这里的原理是临时把苹果的gatekeeper关了并把这个特定的APP白名单了。就可以正常安装了。