What have they innovated?
I'd have to assume you have a mental problem becasue even a fool would have to agree, maybe grudgingly that Apple has indeed raised the bar and force MS and others to copy.
Here you are:
1981 - 1983 (Lisa and Mac Development teams)
General User Interface
Mouse
Menus
Controls
Windows
Desktop Metaphor
Files - multi-forked filing system
long file names (with spaces & special symbols)
automatic typed icons (type + creator)
1984
Desk Accessories (copied in IBM-compatible world as "TSR")
multitasking: Desk Accessories
Sensible System folder
Dynamic, user-accessible system extension (fonts, INITs, control panels, DA's)
Drag-and-drop Application installation
fast and easy access to international characters
User-extensible font manager
Plug-and-play printing; page setup & print dialogs
Built-in clock with backup battery; reliable file dating
Sound
Built-in speaker, 4 voice sound synthesizer, full digitized sound samples
Speech
Speech synthesis (Macintalk)
Floppy 3.5" floppy (400K)
with automounting and auto-eject
Also added a floppy disk cache
hot-swappable peripherals
mouse
MacPaint, MacWrite, MacDraw
First person mainstream networked game (first person dungeon like game -- MazeWar, initially created at Xerox
Mac128K was an Ergonomic All in one Machine , semi-portable
Use of icons to label ports (all ports keyed to prevent mistakes)
1985
LaserWriter printer with Postscript (Apple also helped Adobe get off the ground as a company)
Networking (plug & play, integrated --AppleTalk/LocalTalk)
Direct manipulation Resource Editor
Desktop Publishing (actually came from Mac Application called ReadySetGo, then Adobe Pagemaker, also Scoop, Xpress and a few others at about the same time, because of what the Macs WYSIWG capabilities)
OOP / OOD (Object Oriented Design and Programming)
Object Pascal (later borrowed by Borland)
MacApp (first mainstream Object Oriented Framework, MS copied poorly with MFC)
Movable Palettes
1986
Plug-and play peripherals (SCSI) - ability to handle volumes/partitions to 2GB
Hypercard (simple object programming -- precursor to Visual Basic)
Hypercard (simple hypertext linking -- precursor to the Web
First personal computer with 4MB linear memory space (Mac Plus)
Kanjitalk
More versatile "Wavetable" sound
Memory Modules (SIMMS) instead of installing RAM
Dial in modem service. Apple create AppleLink communication service -- GE used the software to create AOL.
Scroll speed throttle for uniform user experience regardless of processor speed.
ADB (Apple Desktop Bus): extensible, auto-config low-speed peripheral bus (precursor to USB)
1987
Plug-and-play bus expansion (NuBus)
Multifinder application multitasking
Ability to assign labels to files
Multiple monitor support: single large desktop
Color QuickDraw, 256 color 640x480 graphics (same year as VGA with 16-color 640x480 or 256-color 320x200)
Accelerated video cards
Full Page Display
Dual Page Displays
GWorlds (off screen graphics images used)
Built in masking, antialiasing and Dithering of images (actually masking and dithering was earlier).
Industrial Design: Snap Open
1988
SCSI plug-and-play CD-ROM
Ethertalk
Superdrive, can read and write Mac, DOS, OS/2 files
1989
photo-realistic images (32-bit QuickDraw)
32 Bit Clean OS and 32-bit clean computers (software patches fixed older machines, no BIOS replacements)
A/ROSE real-time operating system for smart cards
Multiprocessing (using cards like YARC and Radius Rocket)
Mac Portable, first mainstream portable with an integrated trackball and active matrix screen
1990
Sound input
Built-in Ethernet (Quadra)
Publish and Subscribe and early work on Object Embedding (later to be borrowed and become OLE)
Aural feedback for controls (Sonic Finder)
Ability to assign custom icons to Finder objects
1991
Powerbook 100: first laptop with keyboard in back, trackball in front.
TrueType outline font technology (licensed to Microsoft)
Balloon help (with contextual feedback)
Built in File sharing
Robust aliases
QuickTime
Multimedia -- Apple created the term. They had been the first to integrate Sound, Speech, Text and Graphics (multiple medias), then expanded to include video (and later 3D) and pushed with CD-ROMs
Virtual Memory
Appletalk Remote Access
AppleScript: application and system scripting
Integrated eMail
Integrated Keychain (Security)
Encryption and Security
Network Browser
Trash you have to empty (item in trash survive power down)
1992
Powerbook Duo: first dockable (e.g. "port replicator") but much more elegant
Global text input support (WorldScript)
ColorSync color matching
Built-in CD-ROM's
Video Input - AV models
Integrated DSP
1993
Next generation speech synthesis
Speech recognition (Speakable Items)
Integrated telephony (Geoport)
First PC with built-in TV
PDA
Handwriting Recognition (Newton)
Gesture Recognition
1994
Powerbook 520: first widely-available laptop with trackpad.
Power Macintosh: PowerPC RISC chip
68K emulation for seamless backward compatablity.
Graphing Calculator: real-time equation visualization, 2D and 3D.
MacOS on Unix (MAE)
"Most Recent" folders
Hierarchical menus
Windowshade (collapsible windows)
AppleGuide (help system with coachmarks)
PC Exchange (cross platform file compatibility)
Macintosh Easy Open (can open PC files)
DOS/Windows compatibility cards and emulation software
Threads
TCP/IP support
Powerbook file synchronization
Continuous speech recognition and input (Cantonese dictation)
Bento - Object Oriented Document model
IEEE-1394 (FireWire)
1995
QuickTime VR, Conferencing
Open Transport Networking (streams)
QuickDraw 3D
Plug & Play PCI bus (PCI Only -- no ISA or older bus)
1996
OpenDoc (Fully document centric interface model)
Integrated Browser (CyberDog)
Web as a data-type (CyberDog)
1997
Popup folders
Spring loaded folders
1998
Sherlock full-text indexing and internet searching
Titlebar (icons to represent the folder itself for dragging etc)
Appearance manager (Themes)
Audio Themes (Sonic Finder finally ships in 8.5)
Tear off Menu (Application Menu. Also Apple and NeXT merged, NeXT created them)
Resizable Menus
Customizable scroll bar behavior
Integrated System Wide antialiasing.
iMac - clear case, return of all-in-one, simplified design, ALL plug & play I/O, floppyless design
USB (Universal Serial Bus) :this is a copy of the Apple Desktop Bus (ADB). Apple was also the first to make it ubiquitous and standard.
1999
Industrial Design: Handles + Door
AirPort -- Wireless anetworking made easy
And don't give any crap on who invented the mouse. Apple was the first to put it in a PC.
Sheesh.