Can I use a non-sinewave inverter to power my macbook

Some power supplies can not tolerate the output of inverters that are not sine wave. I don't want to experiment using my non- sinewave inverter and find out that the Magsaf power adapter smokes.

You should use your serial number to lookup the Technical Specifications for your MAC. The current MB specs are:
Electrical and operating requirements
Line voltage: 100V to 240V AC
Frequency: 50Hz to 60Hz
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: -13° to 113° F (-24° to 45° C)
Relative humidity: 0% to 90% noncondensing
Maximum operating altitude: 10,000 feet
Maximum storage altitude: 15,000 feet
Maximum shipping altitude: 35,000 feet
You can go ahead and test it on the inverter. The voltages produced by the inverter - whether a proper sine-wave or a chopped square-wave - are safe for your adapter.
What you need to test is that the adapter does not "need" an accurate clock signal. It is common for desktop computers in North America to use the 60-hz sine-wave for a timebase in the DC output regulator.
Square waves don't have the same zero-cross timing as a sine-wave, so the output voltage would not work with anything but a true sine-wave inverter.
I doubt your adapter will care since I have yet to see any laptop or portable with an external p/s that does.
Pop out your battery, and see if you can boot from the adapter on the inverter. If you can, then your good to go!
Let me know how it works out.

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