After isolating an issue on your Mac to a possible hardware issue, you can use Apple Diagnostics to help determine which hardware component might be causing the issue. Apple Diagnostics also suggests solutions and helps you contact Apple Support for assistance.
If your Mac was introduced before June 2013, it uses Apple Hardware Test instead.
How to use Apple Diagnostics
Advanced Serial Port Terminal is a must-have tool for every developer and programmer. This session-based multi-purpose application lets you connect to any serial port device to check, troubleshoot or debug its work and connection. MathWorks Machine Translation. The automated translation of this page is provided by a general purpose third party translator tool. MathWorks does not warrant, and disclaims all liability for, the accuracy, suitability, or fitness for purpose of the translation. A basic tool for testing your serial port connection on your Mac is CoolTerm by Roger Meier: CoolTerm is a simple serial port terminal application (no terminal emulation) that is geared towards hobbyists and professionals with a need to exchange data with hardware connected to serial ports such as servo controllers, robotic kits, GPS receivers.
- Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power.
- Make sure that your Mac is on a hard, flat, stable surface with good ventilation.
- Shut down your Mac.
- Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, it displays a progress bar indicating that it's checking your Mac:
- Checking your Mac takes 2 or 3 minutes. If any issues are found, Apple Diagnostics suggests solutions and provides reference codes. Note the reference codes before continuing.
- Choose from these options:
- To repeat the test, click ”Run the test again” or press Command (⌘)-R.
- For more information, including details about your service and support options, click ”Get started” or press Command-G.
- To restart your Mac, click Restart or press R.
- To shut down, click Shut Down or press S.
If you choose to get more information, your Mac starts up from macOS Recovery and displays a web page asking you to choose your country or region. Click ”Agree to send” to send your serial number and reference codes to Apple. Then follow the onscreen service and support instructions. When you're done, you can choose Restart or Shut Down from the Apple menu.
This step requires an Internet connection. If you're not connected to the Internet, you'll see a page describing how to get connected.
Learn more
If holding down the D key at startup doesn't start Apple Diagnostics:
- If you're using a firmware password, turn it off. You can turn it on again after using Apple Diagnostics.
- Hold down Option-D at startup to attempt to start Apple Diagnostics over the Internet.
Serial Connection Software For Mac
Using Advanced Serial Port Terminal you will be able to change serial port settings without the need to close and reopen the serial port, adjust baudrate, databits, parity, stop bits, flow control parameters; save all received bytes into a file for later analysis and lots more. Send, receive and view data in hexadecimal format, switch between dump and terminal view modes: all of these features are very useful for debugging and testing serial port connections.
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Related Solutions
- Serial Port MonitorA utility for serial port monitoring. Supports all COM port types, monitoring of multiple serial ports, etc.
- Virtual Serial Port DriverA tool for creating any number of virtual serial port pairs in the system, that behave exactly like real ones.
- Serial to Ethernet ConnectorSoftware for serial data redirection over TCP network. An unlimited amount of serial ports can be shared.
With Serial Port Terminal you can:
Develop hardware and software
Advanced Serial Port Terminal lets you easily test any hardware or software that uses serial ports. As our Terminal can send data in different formats and features the ability to save data streams into a file you can analyze the work of the hardware by sending various types of commands to it.Work with several ports simultaneously
You can work with several COM ports at a time. Change the settings of every port you are working with on the go, save all sessions' parameters and load them every time you launch Advanced Terminal. You can switch between terminal and data views that ensure the most effective way of communicating with serial port device.
The same way you can test any software that uses serial com ports and is located on the remote computer. Advanced Serial Port Terminal will connect to the remote computer via null modem cable or TCP/IP protocol if LAN is enabled.Ease the process of troubleshooting
Advanced Serial Port Terminal provides you with all functionality to test, debug, troubleshoot and tune serial port devices and rs232 connection. You can simply check the work of hardware by sending various types of commands to it. Moreover, save all data streams into a file in order to analyze it later. Advanced Serial Port Terminal allows you to send and receive binary data via X-modem, save history of all typed commands for all opened sessions, view all data that has been sent, send special characters to modem and lots more.
Full features list
| Open any number of serial ports simultaneously |
| Dynamically change communication port parameters without necessity to reopen it |
| View incoming/outgoing data in hex format |
| Switch between terminal and dump view modes |
| Send data blocks in various formats (ASCII/ANSI string, binary, octal and hexadecimal) |
| Redirect incoming data stream into a text file |
| Save configuration parameters for further usage |
| Connect to remote computer using null-modem cable |
| Connect to any number of serial port devices (including virtual ones) |
| Send ASCII file to remote end |
| Send/receive files using X-modem protocol |
- 4.7
Serial Port Terminal has become my favorite. It's just an excellent piece of software that allows me to work with several COM ports at a time, connect to any serial port device to check, troubleshoot its work or connection.
Serial Port Terminal for Windows
• 14-day trialFree Snipping Tool For Mac
(10th Jan, 2011) Release notes