Disk Utility is an essential tool in the Utilities folder to reformat or re-partition a hard drive, mount or create a disc image, repair disk permissions or perform other disk “first aid,” in Mac OS X. In El Capitan, Disk Utility was improved with a more colorful edition providing at-a-glance information of how you use your disk. In the new macOS Sierra system, the new design of Disk Utility is still here. And there is more things improved for Disk Utility in macOS Sierra.
Overview
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Improvements made to Disk Utility in macOS Sierra
The disk partitioning tool in Sierra is much better than the one in El Capitan, making it easier to tell where the system partition is and how much space is available on the disk. Another improvements made to Disk Utility in macOS 10.12 Sierra is Resizeable Disk Utility. The Disk Utility app in OS X El Capitan cannot be resized. Whether this was intentional or a bug remains unclear, but Apple has fixed this issue in Sierra as the Disk Utility window is once again resizeable.
Disk Utility Missing Feature in macOS Sierra: Repair Disk Permission, and the Solution
The Disk Utility app has long contained the ability to verify and repair disk permissions on a Mac, but in Mac OS X El Capitan, this feature has been removed. And the feature isn’t brought back in macOS Sierra. Since El Capitan, there are some essential changes to the way it handles files. In El Capitan and Sierra, the macOS will automatically repairs file permissions during software updates and changes.
So there is actually no need to repair file permissions any more. Though, it’s still often a useful troubleshooting step for remedy an ailing Mac, it’s a pity that the command line of repair file permissions is has been completely removed from macOS Sierra. If you open up Terminal (Applications > Utilities) and type in:
sudo /usr/libexec/repair_packages –verify –standard-pkgs /
You will get sudo: /usr/libexec/repair_packages: command not found.
Disk Utility Missing Feature in macOS Sierra: Burn CD or DVD disc, and the Solution
Another important Disk Utility missing feature in macOS Sierra is the ability to burn CDs and DVDs from Disk Utility as no Mac now ships with an optical drive.
Download Disk Utility For Windows
However, if your Mac has a built-in optical drive, or if you connect an external DVD drive (for example, an Apple USB SuperDrive), you can burn files to CDs and DVDs to share your files with friends, move files between computers, or create backup files. Discs you burn on your Mac can also be used on Windows and other types of computers.
The Solution: Follow these steps to burn a CD or DVD in macOS 10.12 Sierra:
Warning: CD-RW and DVD-RW disks (the RW stands for rewritable) discs rarely work in devices other than your Mac, including CD (audio) players and DVD (video) players. If you burn a music CD or video DVD and intend to watch or listen to it on a device other than your Mac, make sure the disk is a CD-R or DVD-R; NEVER use rewritable CD-RW or DVD-RW disks.
Use the professional DVD Burner for macOS Sierra to Burn DVD disc playable anywhere
Sometimes you may have problems of burn CD or DVD disc in macOS Sierra with the above methods. Even you can successfully burn DVD discs, it is frustrated that they are not playable. In this situation, you can use the professional DVD Burner for macOS Sierra to Burn DVD Disc in macOS Sierra. It can create, make, burn videos to DVDs from popular videos like MP4, MKV, AVI, MPG, MPEG, WMV, MOV, FLV, MTS, MXF, HEVE, YouTube etc. with 90+ free DVD menus on macOS 10.12 Sierra. Moreover, this DVD Maker for macOS Sierra lets you create photo DVD Slideshows with music and edit videos using tools like trim, crop, rotate, watermarks, etc.
Are you sure the SSD is locked? What do you find in Disk Utility? From what are you attempting to reinstall Sierra? Exactly how did you erase the SSD and try reinstalling macOS?
Clean Install of El Capitan or Later on a Clean Disk
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Download Disk Utility For MacDisk Utility Mac Download Sierra 10.12
Use Command-Option-Rto install the version of OS X that was currently installed. Use Command-Option-Shift-R to install the original factory version when the computer was new.
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