I already finished my ModelBuilder which is saved in Toolbox. I created it in ArcGIS PRO and I need to share it with some people, who don´t have ArcGIS PRO, they have just ArcMap 10.2 so I saved it as "10.1./10.2 Toolbox, but when I share it, it shows only Toolbox and models are nowhere.....
I also tried open that saved 10.1./10.2 Toolbox in ArcGIS PRO and also empty..
Check if one of the following works for you.
1. Create a new toolbox > Save as 10.1/10.2 toolbox > Copy the scripts from original toolbox to the newly saved toolbox (or save your script from ModelBuilder in this newly saved toolbox).
2. Ask the ArcMap user to create a blank toolbox and share with you > Copy the scripts in the toolbox.