One of the most useful tools in Network Utility is traceroute, which does exactly what the name implies — it traces the route between your Mac and another machine. Let’s see what happens when running traceroute from my iMac to the United States Patent and Trademark Office (uspto.gov).
The Disk Utility app has long been for working with Mac’s storage devices, including hard drives, SSDs, CDs, DVDs, flash drives, and more. Disk Utility is very versatile, and not only can erase, format, partition, and work with disk images, it's also the first line of defense when it comes to verifying whether a drive is working correctly, as well as repairing drives that are exhibiting various types of issues, including those that may cause a Mac to fail during startup or freeze while being used. Two Versions of Disk Utility: Which Is the Right One for You? Disk Utility can repair common disk issues, ranging from corrupt directory entries to files left in unknown states, usually from power outages, forced restarts, or forced application quits. Disk Utility’s Repair Disk feature is excellent at making minor disk repairs to a volume's file system, and it can make most repairs to a drive’s directory structure, but it’s no substitute for a good backup strategy.
The Repair Disk feature is not as robust as some third-party applications that do a better job of repairing drives as well as recovering files, something Repair Disk is not designed to do. Repair Disk Permissions.
Disk Utility’s Repair Disk Permissions feature is designed to restore file or folder permissions to the state the OS and applications expect them to be in. Permissions are flags set for each item in the file system. They define whether an item can be read, written to, or executed. Permissions are initially set when an application or group of files are installed. The installation includes a.bom (Bill of Materials) file that lists all the files that were installed, and what their permissions should be set to. Repair Disk Permissions uses the.bom file to verify and repair permission issues. What You Need.
Repairing a startup drive with Disk Utility is still possible. To do it, you must boot from another drive that has OS X installed, boot from the OS X installation DVD, or use the hidden Recovery HD volume included with OS X Lion and later. Aside from the time required to restart from another hard drive an installation DVD or the, using Disk Utility’s Repair Disk feature otherwise works the same way and should take about the same amount of time. If you need to boot from an OS X installation DVD, you’ll find instructions on how to do this on pages 2 and 3 of Installing: Upgrading to OS X 10.5 Leopard. Start the process on page 2 of the guide, at the heading, “Start the Process: Alternative Method.” Repair Disk.
![Mac Utility Tools For High Sierra Mac Utility Tools For High Sierra](/uploads/1/2/5/3/125391124/311198623.png)
. After downloading the installer, connect the USB flash drive or other volume you're using for the bootable installer. Make sure that it has at least 12GB of available storage and is. Open Terminal, which is in the Utilities folder of your Applications folder. Type or paste one of the following commands in Terminal. These assume that the installer is still in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using.
After, follow these steps to use it. Connect the bootable installer to a compatible Mac. Use Startup Manager or Startup Disk preferences to select the bootable installer as the startup disk, then start up from it. Your Mac will start up to.
![Mac Utility Tools For High Sierra Mac Utility Tools For High Sierra](/uploads/1/2/5/3/125391124/314627004.png)
Learn about, including what to do. Choose your language, if prompted.
A bootable installer doesn't download macOS from the Internet, but it does require the Internet to get information specific to your Mac model, such as firmware updates. If you need to connect to a Wi-Fi network, use the Wi-Fi menu in the menu bar. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal: Mojave: /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia High Sierra: /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia Sierra: /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia El Capitan: /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia.