But at least we now know a little more about what doesn't work.

Obviously these are requirements of the Electron framework that's being used, and it doesn't help that Electron itself does not currently seem to post any obvious message about the minimum system requirements of Electron applications. and the Linux instructions need to be more specific than saying any amd64 Debian-based distribution will do (as clearly Jessie64 is not included).

Windows 7 or later is required for the Windows version (and it is not likely to work in WINE),.

Mac OS 10.10 or later is required for the Mac version,.

So I think it would be nice if the download page were to say: When I tried manually looking for files like the server kept telling me NoSuchKey no matter which URL I tried (and it wouldn't list its directories). So I tried to install the Linux version into a Vagrant-controlled VirtualBox running Debian 8 'Jessie', but I couldn't get apt-get to see the signal-desktop package (even after installing apt-transport-https and manually editing /etc/apt/sources.list and verifying that apt-get had reported Get:5 xenial InRelease ). So I downloaded the Windows version and tried to run it under WINE, but it said 'Windows 7 or above is required'. When I downloaded Signal Desktop 1.39.4 to an 8-year-old Mac Mini running Mac OS 10.7.5, the OS refused to run it, saying 'The application requires Mac OS X 10.10 or later'.

Mozilla/5.0 (Macintosh Intel Mac OS X 10_7_5)) (Even nicer if the server-side scripts can read your browser string and warn if your computer seems too old, e.g. It would be nice to have the minimum requirements pointed out on that page so we know before downloading.

There is nothing on the download page at stating the minimum OS requirements, so I had to use time and bandwidth downloading before I could find this out.

Download virtualbox for mac os x 10.7.5