removed: Disk Copy 4.2 disk image (.dc42, .diskcopy42, com.apple.disk-image-dc42) DART disk image (.dart, com.apple.disk-image-dart) NDIF disk image (.ndif, .img, com.apple.disk-image-ndif); NDIF disk image segment (.imgpart, com.apple.disk-image-ndif-segment) Directory Utility Directory Utility is a utility included with the macOS (previously Mac OS X) operating system to configure connections to directory services. Prior to Mac OS X 10.5, this tool was named Directory Access. Apple's LDAP implementation is called Apple Open Directory. DVD Player DVD Player (formerly Apple DVD Player) is the default DVD player in macOS. It supports all the standard DVD features such as multiple audio, video & subtitle tracks as well as Dolby Digital 5.1 passthrough, DVD access URLs and closed captions. In some instances, users can choose which VOB file to open. DVD Player is also fully compatible with DVDs authored by DVD Studio Pro and iDVD, including HD DVDs by DVD Studio Pro. As of macOS Mojave, it has been updated to 64-bit, sports a new icon and has better Touch Bar support. DVD Player complies with most copyright laws, and will thus enforce most restrictive measures of DVD technology, such as region-restrictive encodings and user-inhibited operations ("disabled actions"). It does this even when using an all-region DVD drive. It will even force Apple's Grab (screen-grabbing) program to cease functioning through the Finder interface until the DVD Player application is quit, effectively preventing the user from taking screen captures of visual DVD content. The software does not contain a DTS decoder, so DTS tracks cannot be played through the Mac's built in speakers or analog output. However, DTS tracks can be output to devices that have their own decoder, so playback is supported through outputs such as S/PDIF, DisplayPort and HDMI. It has never supported the ability to play Blu-Ray discs. Expansion Slot Utility Expansion Slot Utility allows manual allocation of PCIe card bandwidth. It is only available on certain Mac Pro models. Feedback Assistant The Feedback Assistant is made available to customers in the Apple Software Customer Seeding, AppleSeed for IT or Apple Beta Software programs and allows a user to manually send feedback, reports, or requests to Apple. HelpViewer Help Viewer is a WebKit based HTML viewer for macOS aimed at displaying help files and other documentation. It is found in . The default file extension is ".help". Help index files are generated with Help Indexer. macOS applications typically use Help Viewer to display their help