Mac OS X Panther

Panther's system requirements are:

• PowerPC G3, G4, or G5 processor (at least 233 MHz)
• Built-in USB
• At least 128 MB of RAM
• At least 1.5 GB of available hard disk space
• A CD Drive for installation

Macs that are compatible with Panther:

• Power Mac G5--all models except Power Mac G5 (Early 2005), Power Mac G5 (Late 2005) which use Mac OS X 10.4^[6]
• Power Mac G4 or Macintosh Server G4--all models
• Power Macintosh G3 or Macintosh Server G3 that have built-in USB ports
• iMac--all models released in 2004 or earlier
• iBook--all models except iBook G4 (Mid 2005) which uses Mac OS X 10.4^[6]
• PowerBook G4--all models except PowerBook G4 (Double-Layer SD) which uses Mac OS X 10.4^[6]
• PowerBook G3--Bronze Keyboard models only^[6]

See Power PC Mac models

Apple advertised that Mac OS X Panther had over 150 new features, including:

• Finder was updated with a brushed-metal interface, and given a new live search engine, a customizable Sidebar, secure deletion, colored labels (resurrected from classic Mac OS^[7]) in the filesystem and Zip support built in. The Finder icon was also changed.
• Fast user switching was introduced; it allows a user to remain logged in while another user logs in, and supports quickly switching among several sessions.
• Exposé is a new feature that helps the user manage windows by showing them all as thumbnails.
• TextEdit is now compatible with Microsoft Word (.doc) documents.
• Xcode developer tools have faster compile times with gcc 3.3.
• Preview has increased speed of PDF rendering.^[8]
• QuickTime now supports the Pixlet high-definition video codec.^[8]
• Font Book is a font manager which simplifies viewing character maps, and adding new fonts that can be used systemwide.^[8] The app also allows the user to organize fonts into collections.
• FileVault is a new app that has on-the-fly encryption and decryption of a user's home folder.^[8]
• iChat AV now has built-in audio- and video conferencing.^[8]
• X11: Compatibility^[8] for applications based on the X Window System, commonly used for UNIX applications, is available through an optional install, found in the install disk. Mac OS X Panther is the first macOS version to officially support X11. It utilizes Quartz to provide hardware accelerated graphics^[9] and is based on the XFree86 implementation^[10] of X Window System.
• Safari is a new web browser that was developed to replace Internet Explorer for Mac when the contract between Apple and Microsoft ended, although Internet Explorer for Mac was still available. Safari 1.0 was included in an update in Jaguar but was used as the default browser^[4] in Panther.
• Microsoft Windows interoperability improvements were made, including out-of-the-box support for Active Directory and SecurID-based VPNs.
• Built-in fax support.^[11]: 1 Sending a fax can be done using the native Print dialog.^[11]: 2 To receive faxes, users must pre-configure in System Preferences on how the system should handle an incoming fax, with options^[11]: 4 including selecting a folder to save the incoming faxes, to automatically email to an address or to print via a selected printer, upon receiving of the fax.
• Secure Empty Trash is a feature added in Mac OS X Panther^[12] to ensure, through the use of data erasure techniques, that deleted files cannot be recovered.^[13]
• Panther added support for WPA and WPA2 level security on wireless networks (with the AirPort 4.2 software update).