diff --git a/src/postgres/src/backend/postmaster/postmaster.c b/src/postgres/src/backend/postmaster/postmaster.c
index a50aff56632d..6456f408905c 100644
--- a/src/postgres/src/backend/postmaster/postmaster.c
+++ b/src/postgres/src/backend/postmaster/postmaster.c
@@ -944,6 +944,19 @@ PostmasterMain(int argc, char *argv[])
 	}
 
 	YBReportIfYugaByteEnabled();
+#ifdef __APPLE__
+	if (YBIsEnabledInPostgresEnvVar()) {
+		/* 
+		 * Resolve local hostname to initialize macOS network libraries. If we
+		 * don't do this, there might be a lot of segmentation faults in
+		 * PostgreSQL backend processes in tests on macOS (especially debug
+		 * mode).
+		 *
+		 * See https://github.com/yugabyte/yugabyte-db/issues/2509 for details.
+		 */
+		YBCResolveHostname();
+	}
+#endif
 
 	/*
 	 * Create lockfile for data directory.
diff --git a/src/yb/common/ybc_util.cc b/src/yb/common/ybc_util.cc
index e51faf665b71..1a71e6eaac3d 100644
--- a/src/yb/common/ybc_util.cc
+++ b/src/yb/common/ybc_util.cc
@@ -30,6 +30,8 @@
 #include "yb/util/status.h"
 #include "yb/util/version_info.h"
 
+#include "yb/util/net/net_util.h"
+
 #include "yb/gutil/stringprintf.h"
 
 using std::string;
@@ -258,6 +260,15 @@ const char* YBCGetStackTrace() {
   return YBCPAllocStdString(yb::GetStackTrace());
 }
 
+void YBCResolveHostname() {
+  string fqdn;
+  auto status = GetFQDN(&fqdn);
+  if (!status.ok()) {
+    LOG(WARNING) << "Failed to get fully qualified domain name of the local hostname: "
+                 << status;
+  }
+}
+
 } // extern "C"
 
 } // namespace yb
diff --git a/src/yb/common/ybc_util.h b/src/yb/common/ybc_util.h
index a15b2004bd03..1e7a1bda49d6 100644
--- a/src/yb/common/ybc_util.h
+++ b/src/yb/common/ybc_util.h
@@ -42,6 +42,8 @@ const char* YBCStatusCodeAsCString(YBCStatus s);
 
 bool YBCIsRestartReadError(uint16_t txn_errcode);
 
+void YBCResolveHostname();
+
 #define CHECKED_YBCSTATUS __attribute__ ((warn_unused_result)) YBCStatus
 
 typedef void* (*YBCPAllocFn)(size_t size);