FetchIt has been about a month since the release of macOS 10.12 Sierra, which has given us time to gather information about our users' experiences running Fetch on Sierra. We are happy to report that Fetch 5.7.5 is compatible with Sierra, but there are a few issues users should be aware of.
First of all, a number of users have reported errors running older versions of Fetch, such as Fetch 5.3.1, on Sierra. We recommend only running the latest version, which can be downloaded here.
We have received a few reports of users receiving errors when trying to connect to SFTP servers after upgrading to Sierra (for example: "no matching host key type found. Their offer: ssh-dss"). Sierra includes a new version of OpenSSH, the system SSH software, and this new version deprecates support for some SSH features that are in fairly wide use (for example, DSA/DSS public keys). The solution for this problem is to move to more secure alternatives. If that is not an option -- because, for example, you do not have control over a server using the deprecated feature -- it is possible to configure your Mac to continue using the feature. In that case please contact us for help.
Finally, a number of users have reported a problem clicking on items in the Put dialog. This problem appears to only affect Sierra users with late model Retina Macs, such as the 2015 MacBook Pro and the 5K iMac. On those machines, clicking once on a file name does nothing, and double-clicking uploads the folder containing the file instead of the file itself. We have determined that this problem is caused by a bug in macOS 10.12 and 10.12.1. It affects many other applications, such as BBEdit, as well. We, along with others, have reported this bug to Apple, and hope that it will be corrected in a future System Update. In the meantime, users with the affected machines can work around the problem by holding down the Option key while clicking on file names. We apologize for the inconvenience this causes. UPDATE: it appears that this bug is fixed in macOS 10.12.2. Thanks, Apple!
Many thanks to all the users who have reported their experiences using Fetch on Sierra!