Ryan Sean Davy handed himself in to authorities in Kathmandu yesterday after being caught last week hiding in a cave near Everest's base camp without a permit.
The 43-year-old began swearing and threatening officials from the tourism department during questioning and was arrested under Nepal's strict public order laws, Tourist Police Inspector Tulasha Khatiwada told AFP.
He is now in custody and will appear in court next week to face charges related to his Everest attempt and possible additional offences over his conduct during the investigation.
Foreigners have to pay the Nepal government $11,000 for permission to climb the 8,848-metre (29,029-foot) peak -- a major earner for the impoverished country.
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Under Nepali law, climbers caught without the mandatory permit are fined USD 22,000.
He could also be blacklisted from the Himalayan nation for five years, or face a 10-year climbing ban when he appears in court next week.
The South African -- who describes himself on social media as a film director and producer -- was caught a short distance from Everest base camp and was ordered off the mountain.
He told officials he had climbed alone as far as camp two -- at 6,400 metres -- to acclimatise in preparation for a solo summit bid.
His antics have angered many in the close-knit climbing community, who say the South African would have put himself and others in danger if he had attempted to reach the summit alone.
Davy was caught not far from where more than 1,000 mountaineers and support staff have gathered for the busy spring climbing season.
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