Mac editions, however, are refreshed with new tools at irregular intervals, often long after the same feature debuts in the same Windows application. The latter will be upgraded with new features, Microsoft said in April, twice each year for enterprise subscribers to Office 365 ProPlus, with each release supported for 18 months before giving way to a pair of successors. Nor does Microsoft update and service Office for Mac for corporate customers as it does the far more popular Windows SKU (stock-keeping unit).

Microsoft has repeatedly classified Office for Mac as a consumer product to justify the half-measure, even for the edition labeled 'Home and Business.' Unlike the Windows version of Office, which receives 10 years of security support, those that run on macOS are allotted half that. The impending cutoff for Office for Mac 2011 is an issue only because Microsoft shortchanges Office for Mac users. At the time, Microsoft cited the long-standing policy of supporting a to-be-retired product for '2 years after the successor product is released' when it added time to 2011. But in the summer of 2015, when it was clear that 2011's successor would not be ready by early 2016, Microsoft extended its lifespan by 21 months. Office for Mac 2011's end-of-support deadline was originally slated for January 2016, approximately five years after the productivity package's release. 10, IT administrators must deploy Office for Mac 2016 or instruct workers covered by Office 365 to download and install the newer suite's applications from the subscription service's portal. To receive security and non-security updates after Oct. The individual applications - Excel, PowerPoint, Outlook and Word - will continue to operate after support ends, but companies will be taking a risk, however small, that malware exploiting an unpatched flaw will surface and compromise systems. As of that date, the Redmond, Wash., developer will cease supplying patches for security vulnerabilities or fixes for other bugs, and halt both free and paid assisted support. 10, a date Microsoft first stamped on the calendar two years ago, but has not widely publicized since. Microsoft's advice about Office for Mac 2011 wasn't unexpected, since support for the application suite is slated to end Oct. Apple is expected to release High Sierra to customers in September.

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