Editing System 7 (section)

===System 7.5===
On September 12, 1994, '''System 7.5''' was released with bug fixes from previous updates and several new features:

*An updated startup screen with a progress bar
*A new interactive help system called [[Apple Guide]]
*A clock in the menu bar (from the third-party freeware control panel SuperClock!)
*An Apple menu item called [[Stickies (software)|Stickies]] (formerly a third-party application called "PasteIt Notes"), which provided virtual [[Post-It Note]]s
*[[WindowShade]], another former third-party shareware control panel, provided the ability to condense a window down to its title bar. It was introduced as a "minimize" feature to compete with Windows 95 as Mac OS had no taskbar or dock.
*[[MacTCP]] was bundled, enabling any Macintosh to connect to the [[Internet]] out of the box for the first time.
*The [[Control Strip]] (a fast way to change the system volume, control the playback of audio CDs, manage file sharing and printers, and change the monitor resolution and [[color depth]]) was enabled on desktop Macintosh models for the first time. It had previously only been included with the PowerBook series.
*A new Desktop Patterns control panel allowed for tiled patterns up to 128x128 pixels with 8-bit color; previous versions were limited to 8x8 pixel tiles with a maximum of eight possible colors. Similar functionality was found on earlier system versions exclusive to [[Macintosh Performa|Performa]] models and was housed in the General Controls panel.
*The Extensions Manager (enabling the user to turn extensions and control panels on and off; also based on a formerly third-party control panel)
*[[Apple Open Collaboration Environment|PowerTalk]], a system-level email handling service and the originator of the [[Keychain (software)|Keychain]] system. 
*The Launcher, a [[Control panel (Mac OS)|control panel]] containing shortcut buttons for frequently used programs (in a manner akin to the [[macOS]] [[Dock (macOS)|Dock]])
*A hierarchical Apple menu (folders within the Apple Menu Items folder would expand into submenus showing their contents. Again, based on a third party control panel; HAM by Microseeds publishing<ref>{{Cite web |title=Classic Mac Wares: MenuChoice 2.1 |url=http://lowendmac.com/wares/menuchoice.html |url-status=live |archive-url=https://web.archive.org/web/20070808135500/http://lowendmac.com/wares/menuchoice.html |archive-date=August 8, 2007 |access-date=December 14, 2007}}</ref>)
*System-wide drag & drop for text and other data (selections can be simply dragged with the mouse and dropped to their new destination, bypassing the clipboard)
*A scriptable Finder
*[[QuickDraw GX]], a 2-D graphics rendering and geometry engine
*For the PowerPC only, an advanced, 3d [[NuCalc|Graphing Calculator]], secretly developed at Apple by a former third party contractor<ref>{{Cite web |title=The Graphing Calculator Story |url=http://www.pacifict.com/Story/ |url-status=live |archive-url=https://web.archive.org/web/20080118235558/http://www.pacifict.com/Story/ |archive-date=January 18, 2008 |access-date=December 14, 2007}}</ref>
*Support for [[OpenDoc]]

System 7.5 is codenamed "Capone", a reference to [[Al Capone]] and "Chicago", which is the codename for Microsoft's [[Windows 95]] and is also the name of the default system font in Mac OS until version 8.<ref name="Apple Confidential">{{cite book |last=Linzmayer |first=Owen |url=https://books.google.com/books?id=mXnw5tM8QRwC |title=Apple Confidential 2.0: The Definitive History of the World's Most Colorful Company |publisher=No Starch Press |date=2004 |isbn=1-59327-010-0}}</ref>{{rp|56}}

System 7.5.1 is primarily a bug fix of 7.5 but also introduced a new "Mac OS" startup screen in preparation for [[Macintosh clone|Mac clones]].

System 7.5.2, released only for the first [[Peripheral Component Interconnect|PCI]]-based Power Macs, introduced Apple's new networking architecture, [[Open Transport]].

System 7.5.3 is a major bug-fix update that also included [[Open Transport]] for other PowerPC-based machines and some 68k-based machines. 7.5.3 improved the 68k emulator, and added translucent dragging to the Drag Manager. It included the first version of [[Control Strip]] to be compatible with all Macs. This was the first version of Mac OS to support [[Symmetric multiprocessing|SMP]] (9500/MP).

System 7.5.3 Revision 2 included performance enhancements; better reliability for PowerBooks using the third-party RAM Doubler program; improved reliability for PowerBook 500, 2300, and 5300 series computers with the PowerPC Upgrade Card; improved reliability when using the Startup Disk control panel; and improved reliability when copying files to 1&nbsp; GB hard disks.

System 7.5.3 Revision 2.1 was shipped with the [[Macintosh Performa|Performa]] 6400/180 and 6400/200; this particular release is specific to these machines as there was stability problems with System 7.5.3 Release 2 on the new hardware, especially with the video card and transferring files over LocalTalk.<ref name="system-software-museum" />{{rp|page=235}}

System 7.5.4 was pulled due to a mistake at Apple, in which some components were not included in the installer.

System 7.5.5 included significant performance improvements for virtual memory and memory management on PowerPC-based Macs, including the elimination of one type 11 error.{{clarify|date=January 2023}} Also included are several reliability improvements, such as fixes for Macs using floppy disks equipped with a DOS compatibility card, improved hard disk access for PowerPC PowerBooks and Performa 5400 through 9500 computers, fixes for Macs that included an Apple TV Tuner or Macintosh TV Remote Control, improvements to LocalTalk and networking (especially for the Performa 5400 and 6400), fixes to system startup for the faster 180&nbsp; MHz Macs (which included PowerPC 604 or 604e processors), improved reliability when using sound-intensive applications on Quadra or Centris computers that contained the PowerPC upgrade card, and improved stability when using multiple background applications and shared printers on a network. System 7.5.5 is also the last System 7 release that can run on 68000-based Macs such as the Macintosh Plus and Macs with ROMs that lack support for 32-bit addressing such as [[Macintosh IIcx]]. 7.6 and later required a 68030 processor and 32-bit-addressing-capable ROM and will automatically turn on 32-bit addressing on boot.<ref>{{Cite web |last=Hoffman |first=Ilene |date=December 14, 2000 |title=Mac Corner: Your Mac OS, part 2 |url=http://www.techrepublic.com/article/mac-corner-your-mac-os-part-2/5030860 |archive-url=https://web.archive.org/web/20110308203756/http://www.techrepublic.com/article/mac-corner-your-mac-os-part-2/5030860 |archive-date=March 8, 2011}}</ref>