Fix README: Linux/Unix only, not cross-platform

- Remove inaccurate macOS/Windows claims
- Clarify this is a Linux/Unix program
- Update CI to only test Linux builds
- Remove misleading 'coming soon' language

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest]
         go-version: ['1.21', '1.22']
 
     steps:

INSTALL.md

@@ -29,8 +29,8 @@ make install-user
 ## System Requirements
 
 - **Go 1.21 or later** - Required for building from source
-- **Linux/macOS/Windows** - Core functionality works on all platforms
-- **xclip or wl-clipboard** (Linux only) - For clipboard support. macOS/Windows clipboard coming soon
+- **Linux/Unix system** - Designed for Unix-like operating systems
+- **xclip or wl-clipboard** - For clipboard support (X11/Wayland)
 
 ## Build Dependencies
 
@@ -152,8 +152,8 @@ Ensure you have clipboard tools installed:
 
 Install:
 - Debian/Ubuntu: `sudo apt-get install xclip` or `sudo apt-get install wl-clipboard`
-- macOS: Clipboard works natively
 - Arch: `sudo pacman -S xclip` or `sudo pacman -S wl-clipboard`
+- Other distributions: Install `xclip` or `wl-clipboard` from your package manager
 
 ## Uninstallation
 

README.md

@@ -10,8 +10,8 @@ A modern password manager using AGE encryption.
 - **Master password model**: Single password protects all stored passwords
 - **Git integration**: Optional git repository support for version control
 - **Command-line interface**: Simple, intuitive commands
-- **Cross-platform**: Core functionality works on Linux, macOS, and Windows
-- **Clipboard support**: Linux (X11/Wayland). macOS and Windows clipboard support coming soon
+- **Linux/Unix**: Designed for Linux and Unix-like systems
+- **Clipboard support**: X11 and Wayland clipboard integration
 - **Secure password generation**: Cryptographically secure random password generation
 
 ## Installation
@@ -19,9 +19,10 @@ A modern password manager using AGE encryption.
 ### Prerequisites
 
 - **Go 1.21 or later** - Required for building
+- **Linux/Unix system** - Designed for Unix-like operating systems
 - **Git** - For cloning the repository
 - **pandoc** or **go-md2man** (optional) - For building manpages
-- **xclip** or **wl-clipboard** (Linux only) - For clipboard support
+- **xclip** or **wl-clipboard** - For clipboard support (X11/Wayland)
 - **xclip** or **wl-clipboard** (Linux only) - For clipboard support
 
 ### Build from Source