diff --git a/.gitignore b/.gitignore
index be910bc..619f459 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,6 +27,5 @@ go.work.sum
 # syncthing files
 .stfolder
 
-chatlog
 chatlog.exe# Added by goreleaser init:
 dist/
diff --git a/cmd/chatlog/cmd_dumpmemory.go b/cmd/chatlog/cmd_dumpmemory.go
new file mode 100644
index 0000000..3d669cf
--- /dev/null
+++ b/cmd/chatlog/cmd_dumpmemory.go
@@ -0,0 +1,148 @@
+package chatlog
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"runtime"
+	"time"
+
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/cobra"
+
+	"github.com/sjzar/chatlog/internal/wechat"
+	"github.com/sjzar/chatlog/internal/wechat/key/darwin/glance"
+)
+
+func init() {
+	rootCmd.AddCommand(dumpmemoryCmd)
+}
+
+var dumpmemoryCmd = &cobra.Command{
+	Use:   "dumpmemory",
+	Short: "dump memory",
+	Run: func(cmd *cobra.Command, args []string) {
+		if runtime.GOOS != "darwin" {
+			log.Info().Msg("dump memory only support macOS")
+		}
+
+		session := time.Now().Format("20060102150405")
+
+		dir, err := os.Getwd()
+		if err != nil {
+			log.Fatal().Err(err).Msg("get current directory failed")
+			return
+		}
+		log.Info().Msgf("current directory: %s", dir)
+
+		// step 1. check pid
+		if err = wechat.Load(); err != nil {
+			log.Fatal().Err(err).Msg("load wechat failed")
+			return
+		}
+		accounts := wechat.GetAccounts()
+		if len(accounts) == 0 {
+			log.Fatal().Msg("no wechat account found")
+			return
+		}
+
+		log.Info().Msgf("found %d wechat account", len(accounts))
+		for i, a := range accounts {
+			log.Info().Msgf("%d. %s %d %s", i, a.FullVersion, a.PID, a.DataDir)
+		}
+
+		return
+
+		// step 2. dump memory
+		account := accounts[0]
+		file := fmt.Sprintf("wechat_%s_%d_%s.bin", account.FullVersion, account.PID, session)
+		path := filepath.Join(dir, file)
+		log.Info().Msgf("dumping memory to %s", path)
+
+		g := glance.NewGlance(account.PID)
+		b, err := g.Read()
+		if err != nil {
+			log.Fatal().Err(err).Msg("read memory failed")
+			return
+		}
+
+		if err = os.WriteFile(path, b, 0644); err != nil {
+			log.Fatal().Err(err).Msg("write memory failed")
+			return
+		}
+
+		log.Info().Msg("dump memory success")
+
+		// step 3. copy encrypted database file
+		dbFile := "db_storage/session/session.db"
+		if account.Version == 3 {
+			dbFile = "Session/session_new.db"
+		}
+		from := filepath.Join(account.DataDir, dbFile)
+		to := filepath.Join(dir, fmt.Sprintf("wechat_%s_%d_session.db", account.FullVersion, account.PID))
+
+		log.Info().Msgf("copying %s to %s", from, to)
+		b, err = os.ReadFile(from)
+		if err != nil {
+			log.Fatal().Err(err).Msg("read session.db failed")
+			return
+		}
+		if err = os.WriteFile(to, b, 0644); err != nil {
+			log.Fatal().Err(err).Msg("write session.db failed")
+			return
+		}
+		log.Info().Msg("copy session.db success")
+
+		// step 4. package
+		zipFile := fmt.Sprintf("wechat_%s_%d_%s.zip", account.FullVersion, account.PID, session)
+		zipPath := filepath.Join(dir, zipFile)
+		log.Info().Msgf("packaging to %s", zipPath)
+
+		zf, err := os.Create(zipPath)
+		if err != nil {
+			log.Fatal().Err(err).Msg("create zip file failed")
+			return
+		}
+		defer zf.Close()
+
+		zw := zip.NewWriter(zf)
+
+		for _, file := range []string{file, to} {
+			f, err := os.Open(file)
+			if err != nil {
+				log.Fatal().Err(err).Msg("open file failed")
+				return
+			}
+			defer f.Close()
+			info, err := f.Stat()
+			if err != nil {
+				log.Fatal().Err(err).Msg("get file info failed")
+				return
+			}
+			header, err := zip.FileInfoHeader(info)
+			if err != nil {
+				log.Fatal().Err(err).Msg("create zip file info header failed")
+				return
+			}
+			header.Name = filepath.Base(file)
+			header.Method = zip.Deflate
+			writer, err := zw.CreateHeader(header)
+			if err != nil {
+				log.Fatal().Err(err).Msg("create zip file header failed")
+				return
+			}
+			if _, err = io.Copy(writer, f); err != nil {
+				log.Fatal().Err(err).Msg("copy file to zip failed")
+				return
+			}
+		}
+		if err = zw.Close(); err != nil {
+			log.Fatal().Err(err).Msg("close zip writer failed")
+			return
+		}
+
+		log.Info().Msgf("package success, please send %s to developer", zipPath)
+	},
+}
diff --git a/internal/chatlog/ctx/context.go b/internal/chatlog/ctx/context.go
index 11adb03..a97b833 100644
--- a/internal/chatlog/ctx/context.go
+++ b/internal/chatlog/ctx/context.go
@@ -74,6 +74,16 @@ func (c *Context) SwitchHistory(account string) {
 		c.WorkDir = history.WorkDir
 		c.HTTPEnabled = history.HTTPEnabled
 		c.HTTPAddr = history.HTTPAddr
+	} else {
+		c.Account = ""
+		c.Platform = ""
+		c.Version = 0
+		c.FullVersion = ""
+		c.DataKey = ""
+		c.DataDir = ""
+		c.WorkDir = ""
+		c.HTTPEnabled = false
+		c.HTTPAddr = ""
 	}
 }
 
diff --git a/internal/wechat/process/darwin/detector.go b/internal/wechat/process/darwin/detector.go
index d3a978b..8107bc7 100644
--- a/internal/wechat/process/darwin/detector.go
+++ b/internal/wechat/process/darwin/detector.go
@@ -15,10 +15,10 @@ import (
 )
 
 const (
-	V3ProcessName = "WeChat"
-	V4ProcessName = "Weixin"
-	V3DBFile      = "Message/msg_0.db"
-	V4DBFile      = "db_storage/message/message_0.db"
+	ProcessNameOfficial = "WeChat"
+	ProcessNameBeta     = "Weixin"
+	V3DBFile            = "Message/msg_0.db"
+	V4DBFile            = "db_storage/session/session.db"
 )
 
 // Detector 实现 macOS 平台的进程检测器
@@ -40,7 +40,7 @@ func (d *Detector) FindProcesses() ([]*model.Process, error) {
 	var result []*model.Process
 	for _, p := range processes {
 		name, err := p.Name()
-		if err != nil || (name != V3ProcessName && name != V4ProcessName) {
+		if err != nil || (name != ProcessNameOfficial && name != ProcessNameBeta) {
 			continue
 		}