You cannot download 10.4, you must purchase it. Check eBay or FastMac.com for available copies as Apple no longer has copies available for sale.
You can upgrade to Leopard directly but you also have to purchase Leopard. Your computer must also meet the minimum requirements:
System requirements
You must have a Macintosh computer with:
an Intel processor or a PowerPC G4 (867 MHz or faster) or G5 processor
a DVD drive
built-in FireWire
at least 512 MB of RAM (additional RAM is recommended for development purposes)
a built-in display or a display connected to an Apple-supplied video card supported by your computer
at least 9 GB of disk space available, or 12 GB of disk space if you install the developer tools
Mac Os Tiger DownloadMac
  1. Mac OS X Tiger Server - a computer operating system Xserve, rack-mount server designed by Apple. In addition, it does not necessarily pre-installed on Mac mini and Mac Pro and sold separately for use on any Macintosh computer meet their minimum requirements.
  2. Install Mac OS X 10.4 Tiger on VirtualBox Prerequisites. This guide assumes that you have: a Mac OS X host environment, running VirtualBox on an Intel Mac; a universal or i386 install image or disk for Mac OS X 10.4 Tiger; The environment of the example installation procedure was: MacBook Pro (Retina, 15-inch, Mid 2014) OS X El Capitan (10.11.6).

Aug 18, 2008 11:22 AM

Mac Os X Tiger Download Intel

Mac Os Tiger Download

Mac Os 10.4 Iso Download

Mac OS 10.4.6 DVD - (Download #31) Tiger46.dmg.zip Download from Mega. Leopard requires a dual layer DVD. Unless you can find a DVR-R DL blank you'll probably need.