Spotlight
打开对启动盘的索引: You can use OnyX to authorize or prevent the indexing of the startup disk with Spotlight.
删除现有的索引: After indexing is turned off, you can delete the Spotlight index created previously.
隐藏图标/显示图标: You can choose to hide or show Spotlight's icon in the menu bar. This does not affect the indexing itself. Hiding the icon also turns off the Spotlight search keyboard shortcut.
Note: To hide or show Spotlight's icon in the menu bar, System Integrity Protection must be turned off.