2019 MacBook Pro 16" Will not charge and overheating

Make sure you are using the 96W or larger power adapter.

Make sure you are connecting the charging cable directly to the laptop since some adapters may not allow the full power of the charger to reach the laptop. Try using another USB-C port especially on the other side of the laptop.

Try using a different charging cable. Some USB-C cables will only allow slow charging of 60W, while others support 100W charging, and others support charging up to 140W.

My MacBook Pro 16in take 8 hours to charg… - Apple Community

Also, disconnect all other external devices in case one of them is causing a problem.

Try running the Apple Diagnostics to see if any hardware issues are detected.

Here is an Apple article for troubleshooting USB-C charing issues:

If your USB-C power adapter isn't charging your Mac laptop - Apple Support

FYI, if you have at least 80GB+ of Free storage space, then you can create a new APFS volume (make sure to give it unique name), then install macOS to that new APFS volume. This APFS volume will reside next to your existing macOS installation. Test the new OS without installing any third party apps, without restoring from a backup, and without logging into your AppleID or iCloud. Before deleting the new APFS volume, make sure to reselect the original boot volume for the default Startup Disk in System Settings.

You can also just boot into Safe Mode to see if that makes any difference with charging.

Using a different charge cables is a check against a broken cable, but it does nothing against Inadequate cables. Many ordinary cables can only charge at the 60 watts level, and this is not enough to both run and charge the MacBook Pro you are using.

 menu > about this Mac > (system report) > Hardware > Power

what is the power adapter capable of, and how much power is it currently sending to the Mac?

You can try a DFU firmware Revive which resets the T2 security chip & system firmware. I doubt this will help, but it doesn't hurt to try.

When you performed the SMC Reset, did you use the proper procedure? I forgot to mention this in my previous post. The process has changed for the 2018-2020 Intel Macs:

Reset the SMC of your Mac with T2 security chip - Apple Support

You can check the charging rate while booted into macOS by using the command line and the following command which will display the charging status and the amount of electrical current charging or discharging the battery (the first value is the battery's charge level:

pmset  -g  rawlog  |  awk  -F  ";"  '/AC/ {print $3, $2, $7}'

Probably best to copy & paste this command into the open Terminal window since just the slightest mistake will cause it to either fail or display the wrong values (or even nonsense values). This will output the electrical current in mA (milliamps) with a negative value meaning the battery is draining and a positive value meaning the battery is being charged. This command will generally print an update about once a minute with some exceptions. To terminate the command, just press Control + C within the open Terminal window.

Usually you should see a charge rate of 1500-3000 mA. It will vary sometimes due to system load, but it should be at the higher end when the battery charge level is lower & the system is relatively idle. Once the battery charge is about 80% you will see the charge current drop below 1,000mA until it is 0mA when fully charged. I've never really paid too much attention to the charge rate so I cannot say how it varies in any more detail.

Batteries are a wear item, like the soles of your shoes and the tires on your car. Their expected lifetime depends on use (as reflected in Charge cycles) and also in the passage of time, used or not. After a while, you should expect to have to replace the battery.

Battery life also depends on two factors you may be able to control a bit better. Lithium polymer batteries deteriorate when they get too hot, and when they are subject to very deep discharge. These should be avoided when possible.

Despite using these batteries in millions of Apple devices, there is still a lot of of randomness in exactly which battery will fail when.

Apple SUGGESTS (but does not Warrant) that your battery MAY last as long as 1000 charge cycles, provided all other factors are well-controlled.

Apple uses the criterion that a battery that doesn't to hold 80 percent of its original charge capacity should be serviced, and likely replaced.

When designing systems, that 80 percent rule is intended so that, over a Very large sample of devices, almost all will be able to achieve their 'mission' -- still have at least 80 percent capacity at the three-year mark.

Your battery appears to have reached the end of what Apple considers its useful life. if you wish, you can continue to use your Mac on power adapter "until the wheels fall off".

Intel Macs used a System Management (micro-) Controller to manage certain always-on functions like Main processor-clock speed regulation, power-button press detewction, Main Processor power-up and power-down, temperature sensor reading, fan speed regulation, power adapter and battery charge level, and setting the green or amber LED in the MagSafe connector (when present). These functions were controlled even when the computer was nominally OFF. Some Power was consumed when nominally powered off, but it was small enough to be considered negligible.

<< It was a software issue caused by the OS. >>

¿Do you know what you changed to it get resolved?