The channel commenced broadcasting as One HD on 26 March 2009 at 7.00pm in Melbourne (due to live coverage of the Australian Football League) and at 7.30pm in Sydney, Brisbane, Adelaide and Perth.

[5] One HD began broadcasting on Macquarie Media Group's owned and operated Southern Cross Ten regional television stations on digital channel 50 at 7.00pm on 2 July 2009.

In 2011, the channel began to dilute its all-sport format to include adventure-themed reality programming such as Ice Road Truckers and Black Gold, and a weekly feature-length movie or documentary, usually, but not limited to, a sporting theme.

[10] It was confirmed on 4 April 2011 that due to unsupportable overheads associated with running the station as an "all-sport" channel, One HD would begin to air more general entertainment programming alongside sport, particularly shows aimed at an older male audience and would also be rebranded as One.

[13] One's updated schedule included factuals such as Everest: Beyond the Limit, Extreme Fishing with Robson Green, Airline, Long Way Round, Ice Road Truckers, An Idiot Abroad, Cops, dramas such as Terriers, Lights Out, Sons of Anarchy, Burn Notice, Breakout Kings and Psych and films such as The Last King of Scotland, 28 Weeks Later, Babylon AD, Jarhead, Pitch Black, Doom, Hitman and The Manchurian Candidate.

[16][17][18][19] On 10 December 2018, the channel was renamed 10 Bold, due to trademark conflicts with Fairfax Media (which had completed its merger with Nine Entertainment Co.) and the Australian Financial Review publication Boss.

A press release promoting the rebranding acknowledged the conflict, describing the change as being an "early Christmas present to Nine", and quipping that "it's better to be bold than bossy".

The channel broadcast Formula One Grand Prix every qualifying session shown live with a half-hour preview, rights were held till 2015, including IPTV rights from 2011 to 2015[28] and from 2015 onwards Formula One showed a 1-hour highlight package at 9.30pm Mondays on One that aren't live on Network Ten while continuing with a simulcast on tenplay.

Digital joint-venture stations, MDV in Mildura, TDT in Tasmania, WDT in regional Western Australia, DTD in Darwin, and CDT in Central Australia (including remote NT, QLD and SA) also broadcast 10 Bold Drama but in 1080i high definition just like 10 Bold Drama in 10's O&O stations.