Oscar, let me ask you one more similar question.
Ipopt with HSL gives me the following error:
using JuMP, Ipopt
m = Model(Ipopt.Optimizer)
set_optimizer_attribute(m, "linear_solver", "ma86")
@variable(m, x <= 5)
JuMP.optimize!(m)
Exception of type: OPTION_INVALID in file "IpAlgBuilder.cpp" at line 349:
Exception message: Selected linear solver HSL_MA86 not available.
Tried to obtain HSL_MA86 from shared library "libhsl.dylib", but the following error occured:
dlopen(libhsl.dylib, 2): image not found
However, it also works fine with Julia 1.3.
(Your renaming solution (libcoinhsl.dylib->libhsl.dylib) fixed my previous issue with Julia 1.3.).
Do you have any idea how to fix this for Julia 1.4?