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If you simply need shoot a 5k iMac, there are any number of routine techniques to flush that money down the toilet. Be that as it may, you should be a sort of person with a specific sort of access to a specific sort of military equipment to crush one with a 90mm gun. Richard Ryan is that type of guy.
In this video for FullMag, Ryan took a 90mm T8 anti tank gun, an Israeli practice round, and continued to acquaint it with an iMac. The slow movement footage of the effect leaves little to the creative ability, with odds and ends disseminating to the winds. The shrapnel flying about before it hits are from the round itself going supersonic.