HT5395 I dont have messages on my macbook how do I get it

Question

I dont have messages on my macbook how do I get it

Answer 1

A quick run down for other readers.
Generally speaking iChat versions have number one less than the OS version they go with.
So iChat 3 comes in OS  X 10.4.x
iChat 4 comes in OS X 10.5.x and so on.
Messages continues the same numbering system Starting at version 7 in OS X 10.8
Messages 8 comes with Mavericks (OS X 10.9.x)
iChat Updates come with the OS Updates but not at every occasion.
In OS X 10.5 for example iChat 4 gets to version 4.0.9
Messages 7 gets one update during all the OS X 10.8 updates to be version 7.0.1 at the "end"
However Apple seemed to have stopped this sub numbering in Messages  (it is at build three in OS X 10.9.4)
Throughout it is important that the iChat or Messages version "matches" the OS X level it is supposed to go with.
Reinstalling earlier iChat version for Install Disks then requires you run the Combo update of the OS version you are using.
You cannot do this after Apple use the App Store to Upgrade/Update and you need to Reinstall the whole OS.
10:17 pm      Tuesday; August 12, 2014
​  iMac 2.5Ghz i5 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad