Let us see the way of upgrading to the latest version.The Mac OS X 10.10.3 comes with several improvements and changes.With the release of Mac OS X 10.3.5, Apple has quietly renamed the standard updater "regular-sized Delta" and implemented a third type of updater, the "smaller-sized Delta." Here are a few excerpts from Apple's Knowledge Base article on the topic: Sometimes, Software Update preferences is able to offer a "smaller-sized Delta" update than you might expect, or smaller than what you might see on other computers installing the same update.The "smaller Delta" updates are offered when some Mac OS X system files can be modified instead of replaced in their entirety...Not every computer that has Mac OS X 10.3.4 or later can benefit from smaller Software Updates. Sometimes, modifications made to Mac OS X system files, including ones made by third-party products, may require the installation of a full sized version of a Mac OS X software update.
The desktop virtualization software VMware workstation 11 had been used for this demonstration purpose.[Since our initial posting of this article on Wednesday, we've added a couple significant updates; see the end of the article for details.] Prior to the Mac OS X 10.3.5 Update, Apple generally released two versions of each Mac OS X update: a "standard" update and a "Combo" update.The standard update only updated the previous version of the OS to the current version; for example, the standard updater for Mac OS X 10.3.4 could only be used to update Mac OS X 10.3.3.It could be the major update to original 10.10 rather than 10.10.1 and 10.10.2 updates.New Photo app, New Emoji, more i Cloud options, Google 2-step verification and more changes are included in the OS X 10.10.3 update.