If you choose to run Transmit 4 on an OS newer than Sierra, it will launch and work in a basic form, but you may notice some instability in the form of crashes, exception errors, or hangs. Since Transmit 4 was discontinued, it will not be receiving an update to correct these issues. Inevitably, all software generally meets a similar fate.
Improved support for macOS Operations that will transfer no files now complete successfully Duplicate Servers from History are no longer shown when searching Servers list Transmit Disk: Resolved an issue that could prevent Finder windows from automatically opening directly after new install Fixed an issue where the trial dialog may appear even if registered Protocols Dropbox:
Panic Releases Transmit 5 for Mac - FTP & Cloud Drive Manager