Adapted from this Windows tutorial…
It is much the same procedure but as the Mac speaks fluent MIDI there is no need to add anything.
Right click on the Ableton Live icon and select Show Package Contents
Drill down to the MIDI Remote Scripts folder
Rename the Push folder as Original_Push
Unpack the RAR file containing the ClyphX/Push folders and put those folders in the MIDI Remote Scripts folder
If your WiFi network is liable to interference/lag you should create an ad-hoc network. The video below just connects via the regular WiFi network.
In the iPad’s WiFi settings select your ad-hoc network if you created one
Start the Lemur app and load the Shove template from the Lemur editor on the Mac
In the Mac’s MIDI/Audio set up Utility select the Network button
Connect the iPad to the Session
Open Ableton Live and then its Preferences
Select Push and Cyphx as Input Devices and the network session as Input and Output