iosmacosxcode
I have a lot of awesome iOS apps such as Procreate that I would I like to use in OSX. Currently, I am only able to run my own iOS apps in OSX through Xcode. I heard some rumours that thirdparty iOS apps may be possible in the future to work with OSX as Apple tries to integrate its ecosystem even closer to its own services — yet I would like to get it now:
How to get iOS apps working in OS X? Any sandbox using things such as Xcode for third-party apps?
You can use a combination of IFTTT and Zapier.
Bizarrely IFTTT supports iOS reminders but not Google Tasks (https://ifttt.com/ios_reminders).
Zapier supports google tasks but NOT iOS reminders (https://zapier.com/app/explore)
The trick is to trigger from IFTTT and send an email to Zapier which triggers on the email and then updates Google Tasks. I've tested it and it works. The biggest challenge is when you have multiple reminders lists. In this case I have not found a good way to dynamically select the google task list from Zapier as it keys off of task list id and not task list name. I suggest making a separate Zap for each reminder list.
Finally this doesn't solve the problem of doing the initial sync. You can use the gtasks app for this.
My own experience (on 10.9) is that the service uses the default search engine selected for the default browser, so right now my own "Search with…" says "Search DuckDuckGo for…" and will open in Firefox.
This doesn't answer your other questions, but it may mean you don't need to bother. I hope it helps. I've an old system running 10.6 so I'll give that a look when I get a chance and see if the same can be done there.
Best Answer
The reason you can run programs that you have source code and libraries for is that Xcode cross compiles that code to run on x86 architecture inside an iOS simulator.
What you are looking for is an iOS emulator and that's something that Apple doesn't provide. There are emulators around, but they all seem to be startup / venture funded efforts at this point. Time will tell if they decide to release the product to paying users or otherwise monetize that work. As of fall 2013, there are no feasible options to do what you ask.
Realistically, you would need to have source code for those third party apps to be one Xcode build away from simulating those apps on your Mac.
This restriction also applies to the dozens of apps Apple ships as part of iOS that aren't shipped in the Xcode iOS simulator.
The TL;DR summary is you need an iOS device do to most development and testing since: