How To Solve MacBook Not Recognizing Arduino Serial Port?
Recently, I purchased a domestic Arduino basic learning kit, but encountered the issue of the MacBook not recognizing the Arduino serial port during usage. After extensive research, I have summarized the following experiences, hoping to help those who are similarly confused! Problem Analysis: Chip Determines Recognition Capability
Original Arduino UNO uses the ATmega16U2 chip, which macOS can directly recognize through the built-in USB CDC driver (AppleUSBCDC) without needing to install third-party drivers. As long as the latest version of the Arduino IDE is installed, it can be used immediately upon connection, which is very convenient. In contrast, domestic compatible boards often use chips like ATmega16U2 (some domestic versions), CH340, etc., which may not be recognized by macOS and require additional debugging or driver installation.
My Actual Experience
The first domestic motherboard I purchased, although it used the ATmega16U2 chip, should theoretically have been recognized directly by the MacBook. However, in practice, the connection was extremely unstable: I plugged and unplugged it over 20 times in two days, with only 2 successful recognitions. Currently, there is no perfect solution. If your motherboard uses the CH340 chip, you can manually install the driver.
Solutions
Method 1: Purchase an Original Board
The most direct solution is to buy an original Arduino UNO board. After testing, I found that plugging it into the MacBook allows it to be recognized normally without any additional operations. 👉 Copy link to purchase original Arduino: https://u.jd.com/urV6qWG
Method 2: Install CH340 Driver
If you are using a domestic board with the CH340 chip, follow these steps to install the driver to solve the issue:
1. Download the driver file, 👉 Copy link🔗: https://www.wch.cn/downloads/CH341SER_MAC_ZIP.html Search and download the CH341ser_Mac.zip file.
2. Choose the appropriate installation package • For macOS 11.0 and above (not compatible with Rosetta): choose the .dmg file for installation. • For other macOS versions: choose the .pkg file for installation.
3. Allow driver installation If installation is blocked, go to System Preferences > Security & Privacy > General and click ‘Allow Installation’.
4. Restart the computer and connect the device After installation is completed, restart the computer and reconnect the motherboard, open the Arduino IDE to check if the serial port is recognized correctly.
Summary
• For stability and peace of mind: it is recommended to directly purchase the original Arduino board.
• If on a budget: manually installing the driver can also solve some recognition issues of domestic compatible boards.
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