January 12, 20187 yr This firmware was released 11 Dec 2017 but could not be installed if your computer was a Mac running OS Sierra 10.13. They have since worked around this Apple generated issue. The firmware update is very complex involving two downloads and performing steps in a very specific order. But it works. Here is a link to the Sony Firmware update page for Mac: https://esupport.sony.com/US/p/swu-download.pl?mdl=ILCE7RM3&upd_id=11366&os_group_id=3
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