如何在我的MAC上正确安装“ nloptr”软件包？

Question

我试图在R中安装“ nloptr”软件包。（我有Mac）我已经安装了“ nlopt”，但是当我尝试安装“ nloptr”时仍然出现以下错误。

Error: package or namespace load failed for ‘nloptr’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/Library/Frameworks/R.framework/Versions/3.6/Resources/library/00LOCK-nloptr/00new/nloptr/libs/nloptr.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.6/Resources/library/00LOCK-nloptr/00new/nloptr/libs/nloptr.so, 6): Symbol not found: _nlopt_add_equality_constraint
  Referenced from: /Library/Frameworks/R.framework/Versions/3.6/Resources/library/00LOCK-nloptr/00new/nloptr/libs/nloptr.so
  Expected in: flat namespace
 in /Library/Frameworks/R.framework/Versions/3.6/Resources/library/00LOCK-nloptr/00new/nloptr/libs/nloptr.so
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/Library/Frameworks/R.framework/Versions/3.6/Resources/library/nloptr’
Warning in install.packages :
  installation of package ‘nloptr’ had non-zero exit status

有人可以帮我吗？