Apple Inc executives introduced app developers to hardware and software improvements at its Worldwide Developer's Conference 2019 on Monday. Here are some highlights:

Mac Pro:

** Introduced Mac Pro computer for creative professionals starting at $5,999: Mac Pro video card includes programmable chip to speed up high-resolution video playback.

** Unveiled $1,000 monitor stand.

** High-performance AMD Radeon GPUs to power Mac Pro; Mac Pro will have 28-core Intel Corp processor.

** New 32-inch display called the Pro Display XDR.

** Introduced its new MacOS Catalina: replacing iTunes with Apple Music, Apple Podcasts and Apple TV app.

iPad

** New operating system called iPadOS, which is based on iOS for iPhones, making it easier to multi-task with the help of split-screen.

iOS 13

** Unveiled iOS 13, its latest version of its iPhone operating system.

** "Sign in with Apple" for web login: will allows users, for privacy reasons, to login with their Apple IDs instead of Facebook or Google ID. Apple says its system has better privacy.

** Operating system redesigned to include "dark mode": gives system menus and apps a dark background.

** Unveiled a revamped Maps.

** Siri will have a more natural voice and work with apps like Pandora and Waze on CarPlay.

WatchOS 6

** Apple Watch able to download apps directly from app store.

** Cycle Tracking App for tracking menstrual cycles and activity trends. Data stays on the device and is encrypted.