If you are searching for you are likely looking for the last known version of iTunes that works on your specific operating system, or attempting to restore a backup from an older device. This article covers the reality of this specific version number, how to safely download legacy iTunes software, and the crucial technical requirements needed to run it on modern or older Macs.
There are several legitimate reasons why users are hunting for older iTunes installers rather than using the new Music app or Finder: Download Itunes 10.13.99 For Mac --39-LINK--39-
This message essentially tells you that the iTunes installer is with your current operating system because iTunes has been replaced by newer integrated apps. Where Did iTunes Go? If you are searching for you are likely
Any website claiming to have it is lying to get your traffic — or worse, trying to infect your computer. Where Did iTunes Go
Before iOS devices allowed app management strictly on the device itself, power users preferred managing their Home Screen layouts and installing .ipa files (app files) manually via iTunes. While Apple removed the "App Store" tab from iTunes in version 12.7, versions prior to that (like iTunes 10 or early builds of 12) are still prized by users who want to manage their apps manually.