The first of these methods
1.mac-> about the system report->usb->copy manufacturer id**
2.cmd->echo "0x2a45" >> ~/.android/adb_usb.ini
3.ADB Kill-server
ADB start-server
ADB devices
Another method first step: View USB device information (I'm using Meizu mx3)
In terminal input: System_profiler spusbdatatype able to view information for connected USB devices
For example, my USB information such as the following (part of the content):
M351:
Product Id:0x4e26
Vendor ID:0X18D1 (Google Inc.)
version:2.33
Serial NUMBER:351BBJHCBWT6
Speed:up to 480 Mb/sec
Manufacturer:meizu
Location ID:0X1A120000/4
Current Available (MA): 500
Current Required (MA): 2
Among the vendor id:0x18d1 is very important. Write it down.
Step Two: Create and change the Adb_usb.ini file
Input:
VI ~/.android/adb_usb.ini Command, add 0x18d1 in open Adb_usb.ini file (then save exit)
Then be sure to restart the Finder:
Mouse click the Apple flag in the upper left corner of the form –> Force quit –>finder–> and start again
Step Three: Restart ADB
ADB kill-server
ADB start-server
ADB devices
Anroid solve Xiaomi and Meizu can't debug on Mac