lib64objc4 software package provides Runtime library for GNU Objective-C applications (64bit), you can install in your Ubuntu 16.10 (Yakkety Yak) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install lib64objc4
lib64objc4 is installed in your system.
Make ensure the lib64objc4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep lib64objc4 *
You will get with lib64objc4 package name, version, architecture and description in a table
| Distro | Ubuntu 16 10 yakkety yak |
| Section | Libraries |
| Package | lib64objc4 |
| Version | 6.2.0-5ubuntu12 |
| Description | Runtime library for GNU Objective-C applications (64bit) |
| Sub Section | libs |