API for Powerpoint add-in (Windows and Mac) - macos

Is there a new API for developing add-ins for Office 2016 for Mac? I have seen a javascript API but I have not clear if this applies to Office for Mac 2016, Office for Windows 2013+ only or Office Web Apps only.
Please point me to an official documentation clarifying that.

Update, April 2016: MS recently made some announcements about Mac support at Build; primarily around Word & Excel. Interactive chart similar to the image below
Eventually, but not yet. The only thing that is in for Mac is Outlook Read apps.
This is an image they've shared:

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Outlook add-in not available for IMAP on windows

We have an add-in that works fine on Outlook for mac but not on windows for IMAP (Gmail) accounts.
Is the setup different to how the IMAP is configured on MAC and Windows?
Mac Version - 16.41 (20091302)
Win Version - 16.0.13127.20402
This is an issue because a lot of our users are unable to use the add-in when they have multiple accounts in Outlook on windows (of which most are IMAP - Gmail)
I would have thought it would be other way around where Add-ins would be available on Windows and not on Mac since a lot other things are not supported on Mac within outlook.
Are there settings that can be changed to make them available on windows or of anyone knows about this being available in the future?
----------------- UPDATE --------------------
Mac Version - 16.42 (20101102)
So, this morning 19th Oct, 2020. I got an Outlook Update for mac and as per the screenshot below, you can clearly see that I am using a Google Account (IMAP) and the add-ins are availanle.
Outlook Web Add-Ins are only supported on Outlook accounts connected to an Exchange server. Further documentation here : https://learn.microsoft.com/en-us/office/dev/add-ins/outlook/add-in-requirements

Outlook addin not working on Office 2013 or Office 2016

I've submitted my outlook add-in 6 times now and every time the certification failed for a different reason. The last rejection reason I got was that my add-in didn't work on Office 2013 and Office 2016 (which they also refer to as O365 Perpetual).
I develop on a Mac and I have no idea how to go about debugging why my add-in is not working on those older Offices. Can't I just drop support for older Office suites? How could I test these environments?
I'm pretty close to quitting and just not publishing my outlook addin. I have never experienced a worse app review process.
If you want to be published on the Office Store, you need to support all the platforms for the minimum Outlook API Requirement Set in your manifest.
If you do not need to support Outlook 2013 or Outlook 2016, you can set your minimum API requirement set to 1.5, which will drop support for those versions (1.4 was the last version supported by those versions of Outlook). When you submit to the Office Store, please make a note that your minimum API set means that the add-in will not run in those Office clients.

Microsoft Office Document Imaging (MODI) for Office 2016

I have heard about scanned document OCR feature in MS Office 2007.
Are there similar programs which have similar/same feature compatible with Office 2016?
According to my search and test, Office2016 has OCR function and you need to turn it on manually.
Please review link below for more details:
I beieve the OCR is available in Windows 10 or Word 2016.

Outlook add-in both for web and desktop versions

Here was said All-in-one add-in for outlook that this is possible to create the web-based add-in working both with Mailboxes hosted on Office 365 or Exchange 2013 or greater, and with Outlook 2013 or greater, so with web and desktop Outlook versions.Am I right? Can you provide some references on how to develop such an add-in and then install it for both clients? Thanks you.
Best regards
You can start reading the Official documentation on Office add-ins. These new Office add-ins are web applications "served" inside Office products, you will have to be a little familiar with web technologies to develop.
Regarding Outlook add-in, as written by Eric Legault (in the question link), the add-in is not installed on a specific client but on the exchange account whether it is at organisation level or at user level. Consequently, with one install you will have the add-ins working on all Outlook clients (Desktop, OutlookWebAccess etc.).
Take care: Office add-ins now describes both technologies the new one that we are discussing (formerly app for office) and the old COM add-ins. I have written a blog post to explain the in-and-outs of the two technologies.
You are right. You have the opportunity to create a web-based add-in for Office 365 and Office 2013 desktop. But, Microsoft's JavaScript API has limited functionality. I want to recommend you read the following document first: https://msdn.microsoft.com/en-us/en-us/library/office/fp161015.aspx. If you plan to write a small add-in for yourself, the web-based add-in is a great option.

Mac Office Spell Checker API

I have all the documentation for how to develop and deploy proofing tools for MS Office on Windows using CSAPI, but how does one deploy them on Mac?
In 2010, Eric Paquin said Office 2011 for Mac would have the same API: "3rd party proofing tools companies that are relying on Windows API can now port their tools to work on the Mac"
But, I can't find any information regarding this. Anyone know where the docs for Mac development and deployment? Or if this never actually materialized?
And what about Mac Office 2016? I can find the Office Add-ins stuff, which unfortunately can't create integrated proofing tools.
(asked on Technet ages ago, but nobody there knows)
Official Microsoft documentation does exist for deploying to MS Office for Mac. If you run into this problem, keep asking your MS contact about it.
Unfortunately I can't actually share the how, 'cause NDA. But, if you have tried reverse engineering this problem, it basically is as much of a mess as you discovered.

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