Wireshark 3.0.8 does not work on macOS 10.10.5.
The Download website claims that Wireshark 3.0.8 works on macOS 10.8 and later (Intel 64-bit). However, when I try to open the downloaded Wireshark 3.0.8 on my macOS 10.10.5, it says that it requires OS X 10.12 or later.