Mac OS

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Mac OS X
Sad Mac errors
System bomb errors
Macintosh startup tones
Shortcut keys
Apple operating system history


Mac OS X is the name of Apple's desktop operating system. Its features include:

Aqua GUI — Apple's graphical user interface is a highly-iterated facet of the operating system, designed to be a tactile, intuitive and highly-responsive user experience.
Automator — A system utility for automating tasks in the organizational context of a workflow. Added in version 10.4.
Dashboard — A workspace of configurable widgets including sticky notes, news tickers, weather apps, and a standard and scientific calculator. Widgets are arranged on a customizable workspace overlay which can be toggled with a keystroke. Added in version 10.4.
Mission Control — In OS X, every window is a GL object subjugate to larger operating system GUI. Each window can be viewed in realtime as an icon, and the Mission Control interface allows users to quickly navigate and control running applications across multiple virtual desktops. First introduced in summer of 2003, formerly known as Exposé.
FileVault — Provides control of disk encryption, vital in corporate settings. Added in version 10.3.
Screen Sharing — When enabled, allows remote users to view or control the machine. Compatible with standard VNC clients. Added in version 10.5.
Time Machine — Automated file backup service with chronological revision control and a highly-developed visualized metaphor. When using Time Machine to view the history of your backups, the folders and files scroll forward and backward through time like a circular card file or rolodex. Added in version 10.5.


If the "happy Macintosh" and the "Welcome to Macintosh" screens appear before the "sad Macintosh", the problem is probably in the system software.

When the "sad Macintosh" face appears immediately at power up, it usually means a hardware problem. Some of the common hardware issues are problems with SIMMs or hard drive.


1Bus Error
2Address Error
3Illegal Instruction
4Division by Zero
5Rage Check Error
7Privilege Violation
8Trace Mode Error
9Line 1010 Trap
10Line 1011 Trap
11Hardware Exception Error
12Unimplemented Core Routine
13Uninstalled Interrupt
14I/O Core
15Floating Point Error
17List Manager Not Present
18Bit Edit Not Present
19Disk Initialization Package Not Present
20Standard File Not Present
21SANE Not Present
22SANE Transcendental Functions Not Present
23International Utilities Not Present
24Binary-Decimal Conversion Package Not Present
25Out of Memory
26Bad Program Launch
27File System Map Trashed
28Stack Ran into Heap
29AppleShare Error
30Disk Insertion Error
31No Disk Inserted
32-50Memory Manager Error
41The Finder Could Not Be Found on the Disk
51Unserviceable Slot Interrupt
52-53Memory Manager Error
81Bad SANE Opcode
84Menu Purged While in Use
85Couldn't Load MBDF
86Couldn't Load Hierarchical Menu's Parent
87Couldn't Load WDEF
88Couldn't Load CDEF
90Floating Point Coprocessor Not Installed