osx - TortoiseHg: No visual diff tools were detected (Mac) -

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i installed meld in mac , want use visual diff tool in tortoisehg. (note using mac. )

i have following configuration in .hgrc file. when double clicked on file, got "no visual diff tools detected". missing in file ?

this getting little bit frustrating because have spent hours on , still wasn't able solution. need here please . 

[ui] merged = /opt/local/bin/meld  [tortoisehg] vdiff = /opt/local/bin/meld

i had same problem kdiff3 on osx, i'm sure solution works meld well. worked enable extdiff extension in mercurial, define kdiff3 extdiff command , use in [tortoisehg] section.

this .hgrc file these changes made:

[extensions] extdiff =  [extdiff] cmd.kiddf3 = /usr/local/bin/kdiff3  [tortoisehg] vdiff = kdiff3

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