If your Mac is suddenly suffering hardware or software issues, or is generally acting up you can run sysdiagnosein Mac OS X Terminal. Sysdiagnose compiles a number of advanced technical reports for expert Mac users to review and troubleshoot appropriately. Sysdiagnose will output the following information in a tar.gz file.
- Crash report
- Input/Output details
- Disk information
- Compiled system profiler report
- System logs (including kernel logs)
- Filesystem usage report
- Memory usage and processes details
- Powermetrics
Rember is actually a GUI for the popular command line memory testing tool called. Download and install the best free apps for Diagnostic Software on Mac from CNET Download.com, your trusted source for the top software picks.
In reality, Sysdiagnose is ran and performed by Mac OS X technical specialists including Apple store engineers (Genius Bar) and authorized Mac repair shops. The sysdiagnose report is run on Mac X systems as a last or first resort to solving and understanding complex technical hardware and software issues.
Get Started Running Sysdiagnose in Terminal
1. Open Terminal (Applications -> Utilities -> Terminal)
2. Type the following command in Terminal. Be prepared to wait about 2 to 5 minutes for Sysdiagnose to completely run.
You will receive the following warning prompt:
This tool generates files that allow Apple to investigate issues with your
computer and help improve Apple products. The files might contain personal
information found on your device or associated with your iCloud accounts and/or
AppleID, including but not limited to your name, your user name, your email address
and email settings, file paths, file names, downloads, your computer’s IP addresses,
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and network connection information.
This information is used by Apple in accordance with its privacy policy
(www.apple.com/privacy) and is not shared with any other company. By using
this tool and sending the results to Apple, you consent to Apple using the
contents of these files to improve Apple products.
Press 'Enter' to continue.
3. Confirm and press return.
4. Sysdiagnose begins running. Below is what you might see as the process runs.
sysdiagnose version 3.0 (56)
Starting time sensitive tasks...
Running ps
Running thread-aware ps
Running fs_usage, spindump, vm_stat, and top
Running powermetrics
Starting graphics tasks...
Gathering Quartz Compositor information
Starting memory tasks...
Running lsof
Running footprint
Collecting file coordination status
Starting disk tasks...
Running diskutil
Running gpt
Running hdiutil
Running BootCacheControl
Running df
Running mount
Starting kernel tasks...
Starting networking tasks...
Getting Wi-Fi info
Getting opendirectory info
Getting NFS info
Running netstat
Running ifconfig
Running ipconfig
Running scutil
Running dig
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Running get-network-info
Starting power tasks...
Running pmset
Starting configuration tasks...
Running system_profiler
Running ioreg
Gathering loginwindow logs
Gathering logs...
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Generating microstackshot reports...
5. Once Sysdiagnose completes, a new window will pop up to your Mac temporary folder. The path is /var/tmp/ and inside you will have your Sysdiagnosefile - sysdiagnose_2017.02.04_14-20-31-0600.tar.gz – the file will vary in size but should be between 10 and 30megabytes.
6. You can open the .tar.gz file by double-clicking it. This will contain a folder of over 75 files and folders with the information Sysdiagnose collected.
Note: Sysdiagnose collects system info including wireless networks, network configurations, and system account usernames. While the info isn’t necessarily confidential, you should be aware it is being collected if you are sharing these reports.
Remember, Sysdiagnose compiles a detailed report of your Mac OS X machine in attempt to troubleshoot system software or hardware problems. Learn more about troubleshooting Mac X issues.
Sensors, Parameters and Graph Plot
Sensors and parameters are what most of you find the most interesting part of the software. You can monitor all the sensor values that your car reports in real-time.
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The software updates the values in sequential order as fast as possible. The speed depends only on the adapter. The more expensive genuine adapters will perform faster than the cheap clone OBD2 adapters. In addition to showing the current values, minimum, average and maximum values are provided too.
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Some typical sensors include engine coolant temperature, fuel pressure, intake manifold absolute pressure and air flow rate from mass air flow sensor, to list few of them. The software has support for over 126 powertain parameters (PIDs) in the range of $00 - $7F. You can pick the most suitable data reading units; both metric and imperial (English) units are available.
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You can also export or save the live sensor data to a .csv file. This file can be opened with Microsoft Excel or Google Sheets, for example. These external tools allow you to create custom graphs of your data.