diff --git a/prometheus/native.c b/prometheus/native.c
new file mode 100644
index 000000000..74b2e9a9f
--- /dev/null
+++ b/prometheus/native.c
@@ -0,0 +1,60 @@
+//go:build ignore || (darwin && cgo)
+
+#include <mach/mach_init.h>
+#include <mach/task.h>
+// Compiler warns shared_memory_server.h is deprecated, use this instead.
+// But this doesn't define SHARED_XXX_REGION_SIZE.
+//#include <mach/shared_region.h>
+#include <mach/shared_memory_server.h>  // SHARED_DATA_REGION_SIZE, SHARED_TEXT_REGION_SIZE
+#include <mach/mach_vm.h>
+#include <stdio.h>
+
+int getmem (unsigned long long *rss, unsigned long long *vs)
+{
+    // https://github.com/apple-oss-distributions/adv_cmds/blob/8744084ea0ff41ca4bb96b0f9c22407d0e48e9b7/ps/tasks.c#L109
+
+    kern_return_t error;
+    task_t task = MACH_PORT_NULL;
+    struct task_basic_info t_info;
+    mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
+
+    error = task_info(mach_task_self(),
+       TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
+
+    if( error != KERN_SUCCESS )
+    {
+        return error;
+    }
+
+    *rss = t_info.resident_size;
+    *vs  = t_info.virtual_size;    
+
+    {
+        vm_region_basic_info_data_64_t    b_info;
+        mach_vm_address_t                 address = GLOBAL_SHARED_TEXT_SEGMENT;
+        mach_vm_size_t                    size;
+        mach_port_t                       object_name;
+
+        /*
+         * try to determine if this task has the split libraries
+         * mapped in... if so, adjust its virtual size down by
+         * the 2 segments that are used for split libraries
+         */
+        t_info_count = VM_REGION_BASIC_INFO_COUNT_64;
+        error = mach_vm_region(mach_task_self(), &address, &size, VM_REGION_BASIC_INFO,
+             (vm_region_info_t)&b_info, &t_info_count, &object_name);
+
+        if (error == KERN_SUCCESS) {
+            if (b_info.reserved && size == (SHARED_TEXT_REGION_SIZE) &&
+                *vs > (SHARED_TEXT_REGION_SIZE + SHARED_DATA_REGION_SIZE)) {
+                    *vs -= (SHARED_TEXT_REGION_SIZE + SHARED_DATA_REGION_SIZE);
+            }
+        }
+    }
+
+    // `ps -o rss,vsize,command` prints values in KB
+    printf("rss is %qd (%qd KB)\n", *rss, (unsigned long long) (*rss / 1024));
+    printf("vs is %qd (%qd KB)\n", *vs, (unsigned long long) (*vs / 1024));
+
+    return 0;
+}
diff --git a/prometheus/process_collector.go b/prometheus/process_collector.go
index 62a4e7ad9..f39d1e722 100644
--- a/prometheus/process_collector.go
+++ b/prometheus/process_collector.go
@@ -33,6 +33,14 @@ type processCollector struct {
 	inBytes, outBytes *Desc
 }
 
+func init() {
+	// Debugging to show the correct implementation is used based on CGO_ENABLED=0.
+	if rss, vs, err := getMemory(); err == nil {
+		fmt.Printf("GO: rss -> %d\n", rss)
+		fmt.Printf("GO: vs -> %d\n", vs)
+	}
+}
+
 // ProcessCollectorOpts defines the behavior of a process metrics collector
 // created with NewProcessCollector.
 type ProcessCollectorOpts struct {
diff --git a/prometheus/process_collector_darwin.go b/prometheus/process_collector_darwin.go
index 4d9314c3d..c4067acee 100644
--- a/prometheus/process_collector_darwin.go
+++ b/prometheus/process_collector_darwin.go
@@ -85,7 +85,18 @@ func (c *processCollector) processCollect(ch chan<- Metric) {
 		c.reportError(ch, c.cpuTotal, err)
 	}
 
-	// TODO: publish c.vsize and c.rss values
+	if rss, vs, err := getMemory(); err == nil {
+		if rss != 0 {
+			ch <- MustNewConstMetric(c.rss, GaugeValue, float64(rss))
+		}
+
+		if vs != 0 {
+			ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(vs))
+		}
+	} else {
+		c.reportError(ch, c.rss, err)
+		c.reportError(ch, c.vsize, err)
+	}
 
 	if fds, err := getOpenFileCount(); err == nil {
 		ch <- MustNewConstMetric(c.openFDs, GaugeValue, fds)
diff --git a/prometheus/process_collector_memory.go b/prometheus/process_collector_memory.go
new file mode 100644
index 000000000..79a2926a8
--- /dev/null
+++ b/prometheus/process_collector_memory.go
@@ -0,0 +1,34 @@
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build darwin && cgo
+
+package prometheus
+
+/*
+int getmem(unsigned long long *rss, unsigned long long *vs);
+*/
+import "C"
+import "fmt"
+
+func getMemory() (uint64, uint64, error) {
+	var (
+		rss, vs C.ulonglong
+	)
+
+	if err := C.getmem(&rss, &vs); err != 0 {
+		return 0, 0, fmt.Errorf("task_info() failed with 0x%x", int(err))
+	}
+
+	return uint64(rss), uint64(vs), nil
+}
diff --git a/prometheus/prometheus_collector_memory_noop.go b/prometheus/prometheus_collector_memory_noop.go
new file mode 100644
index 000000000..853cd9d8b
--- /dev/null
+++ b/prometheus/prometheus_collector_memory_noop.go
@@ -0,0 +1,20 @@
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !darwin || !cgo
+
+package prometheus
+
+func getMemory() (uint64, uint64, error) {
+	return 0, 0, nil
+}