Using mouse from OSX host on iOS device

Currently, the answer is no. iOS does not have a built in cursor function(unless you count the new keyboard cursor is iOS 9). In order to use a mouse on an iPad at all, you would probably need to jailbreak it.

The design of iOS makes remote control not possible in the manner of KVM/remote pointer control.

There is no concept of pointer in iOS since the touch interface is multi-touch from the get go.

You could enable switch control or voiceover control and theoretically interface with that over the supported or non-supported (jailbreak) channel, but it's still not a true mouse pointer idiom.

• http://www.apple.com/ios/accessibility-tips/

There's tons of software on OS X for remote control of other devices, but you'd need to be more specific to let us help you. Nothing works from OS X to both Android or iOS due to design and architectural differences in those OS and interface design.