Function getAppleGPUMemory

pkg/xsysinfo/gpu.go:1200–1277

getAppleGPUMemory detects Apple Silicon GPUs using system_profiler (macOS only). Apple Silicon uses unified memory, so GPU memory is reported as system RAM.

()

// getAppleGPUMemory detects Apple Silicon GPUs using system_profiler (macOS only).
// Apple Silicon uses unified memory, so GPU memory is reported as system RAM.
func getAppleGPUMemory() []GPUMemoryInfo {
	if _, err := exec.LookPath("system_profiler"); err != nil {
		return nil
	}

	cmd := exec.Command("system_profiler", "SPDisplaysDataType", "-json")
	var stdout, stderr bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Stderr = &stderr

	if err := cmd.Run(); err != nil {
		xlog.Debug("system_profiler failed", "error", err, "stderr", stderr.String())
		return nil
	}

	var result struct {
		SPDisplaysDataType []struct {
			Name       string `json:"_name"`
			Model      string `json:"sppci_model"`
			Cores      string `json:"sppci_cores"`
			DeviceType string `json:"sppci_device_type"`
			Vendor     string `json:"spdisplays_vendor"`
		} `json:"SPDisplaysDataType"`
	}

	if err := json.Unmarshal(stdout.Bytes(), &result); err != nil {
		xlog.Debug("failed to parse system_profiler output", "error", err)
		return nil
	}

	var gpus []GPUMemoryInfo
	for i, display := range result.SPDisplaysDataType {
		if display.DeviceType != "spdisplays_gpu" {
			continue
		}
		if !strings.Contains(strings.ToLower(display.Vendor), "apple") {
			continue
		}

		name := display.Model
		if name == "" {
			name = display.Name
		}
		if name == "" {
			name = "Apple GPU"
		}

		// Apple Silicon uses unified memory — report system RAM
		ramInfo, err := GetSystemRAMInfo()
		if err != nil {
			xlog.Debug("Apple GPU detected but failed to get system RAM", "error", err)
			gpus = append(gpus, GPUMemoryInfo{
				Index:  i,
				Name:   name,
				Vendor: VendorApple,
			})
			continue
		}