I tried to open IGV v2.7 on my mac (OS X 10.10.5) from app and command line. It chashed every time. Here the reported error. I don't know how to solve it. Thank you in advance for the help.
A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00007fff8bfebf72, pid=1408, tid=1811
JRE version: OpenJDK Runtime Environment (11.0.2+9) (build 11.0.2+9)
Java VM: OpenJDK 64-Bit Server VM (11.0.2+9, mixed mode, tiered, compressed oops, g1 gc, bsd-amd64)
C [libsystem_c.dylib+0xf72] strlen+0x12*
Yosemite is quite old, maybe an upgrade of the macOS would do you a favour.
I agree with ATpoint else, you could install a previous version of IGV