To upgrade from Mac OS X 10.4 (Tiger) to 10.5 (Leopard) you will need to buy a boxed version of Mac OS X 10.5. If you have a Mac with an Intel processor you can go straight to Mac OS X 10.6 (Snow Leopard) which is a cheaper upgrade option.
Yes. 10.5 is called "Leopard".
Sorry, but you'll need to go to an Apple Store and buy OSX 10.5.
Mac OS X 10.4.11 is the final version of Mac OS X 10.4 (Tiger). To update further will require the purchase of 10.5 (Leopard) or 10.6 (Snow Leopard).
Details about a Mac can be found by selecting About This Mac from the Apple menu in the top left corner. It may show Version information such as - Mac OS X 10.6 (Snow Leopard), 10.5 (Leopard), or 10.4 (Tiger). The Software Update button will check if there are any updates available for your computer.
The latest version of Mac OS X is 10.6 (known as Snow Leopard). The latest update to Snow Leopard is 10.6.4 which can be downloaded, if it is not installed, by selecting Software Update from the Apple menu (in the top left corner). Software Update will show all the Apple updates that are available for the computer. Update: The newest version of OSX, as of Oct. 2015 is El Capitan. That's 5 versions newer than Snow Leopard.
Snow Leopard needs to be purchased on a disc it can then be installed to update Mac OS X 10.5.8
MAC OS X Leopard which it's current version is MAC OS 10.5.8, maybe 10.5.9 in the future if they ever come out with another update for Leopard.
You need to purchase each version (Panther/Tiger/Leopard) of Mac OS X.Mac OS X 10.3 (Panther) can be updated to 10.3.9.Mac OS X 10.4 (Tiger) can be updated to 10.4.11Mac OS X 10.5 (Leopard) can be updated to 10.5.8
To upgrade from Mac OS X 10.5.x (Leopard) requires the purchase of a copy of Mac Os X 10.6 (Snow Leopard). This is available from Apple stores (See links below) and many other retailers for around $29 (£25) . To be able to run Snow Leopard your Mac needs to have an Intel processor. Macs with older processors (G4 or G5) will not be able to run Snow Leopard and cannot be updated beyond Mac OS X 10.5.x
The current version of Airport Utility 5.4.2 and it is fully compatible with Mac OS X 10.6 (Snow Leopard). The latest versions of all Apple software can be installed by selecting Software Update... from the Apple menu.
Mac Leopard is not a person. It is a piece of desktop software developed for the Apple Mac computers. Its full name is Mac OS X Leopard and one can find more information on the Apple website.
Likely never. Snow Leopard is a $29 upgrade to Leopard, but it requires a Mac with an Intel processor (newer than 2005) and 1 GB of RAM.
Snow Leopard is an upgrade to Leopard and so you will need Leopard installed on your Mac before installing Snow Leopard. For Mac computers with an Intel processor running Tiger you will need to purchase the box set that includes iLife 09 and iWork. (See links below)