我遇到了同样的问题，无法安装软件，因为它目前不可从软件更新服务器。您可以尝试以下步骤，以使软件更新启动命令行工具的更新。

Check if Command Line Tools Update is mentioned in your list of softwares to be updated by using following command: softwareupdate -l If Command Line Tools Update is not mentioned in that list, then manually make it part of the list using following command which will create a temporary file: sudo touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress Verify that the list now has the Command Line Tools mentioned by running softwareupdate -l again. Now, press Cmd+Space to initiate Mac's Spotlight Search. Search for Software Update. Start the Software Update. That will show you following kind of dialog for installing the Command Line Tools. Install away the update and be merry. :) Remove the temporary file created in Step 2: sudo rm /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress.

我知道这是一个老帖子，但我今天也遇到了这个问题。我发现当我执行sudo softwareupdate -l时，命令行工具被列为更新，所以我使用sudo softwareupdate -i -a安装它们。

如果您使用的软件更新服务器不包含所需的包，则可能发生此错误。

你可以通过运行来检查

defaults read /Library/Preferences/com.apple.SoftwareUpdate

看看你是否有一个名为CatalogURL或AppleCatalogURL的条目

您可以通过删除此条目或使用命令指向Apple软件更新服务器

sudo softwareupdate --clear-catalog

然后再次运行命令行工具安装。

你可以从这里手动下载OS X Mavericks的命令行工具:

https://developer.apple.com/downloads/index.action?name=for%20Xcode

命令

xcode-select——安装

建议3个选项:获取Xcode;不是现在;安装。

当我选择获得完整的Xcode命令成功完成。这花了一段时间，但这样我就能完成所有的macports迁移指令。

我遇到了同样的问题，无法安装软件，因为它目前不可从软件更新服务器。您可以尝试以下步骤，以使软件更新启动命令行工具的更新。

Check if Command Line Tools Update is mentioned in your list of softwares to be updated by using following command: softwareupdate -l If Command Line Tools Update is not mentioned in that list, then manually make it part of the list using following command which will create a temporary file: sudo touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress Verify that the list now has the Command Line Tools mentioned by running softwareupdate -l again. Now, press Cmd+Space to initiate Mac's Spotlight Search. Search for Software Update. Start the Software Update. That will show you following kind of dialog for installing the Command Line Tools. Install away the update and be merry. :) Remove the temporary file created in Step 2: sudo rm /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress.