Variant SpellingMacAdie. 
Variant SpellingMcAdy. 
Variant SpellingMcCady. 
Variant SpellingMacKaddie. 
DNA Study(FTDNA) FamilyTree DNA project pages
WebLink(WTyDNA) YDNA tested McADIEs on Wiki Tree and their ancestors (you might need to tweak the search to get name variants!) 
DNA Study(WFN)All WorldFamilies Network - summary project information pages were discontinued May 2018. Check FamilyTreeDNA project pages instead for any publically available project result pages. 
DNA Study(Details) DNA Surnames - detailed project information
WebLink(Family History Soc.) Caithness Family History Society
WebLink(Forum) forum
WebLink(Rootsweb) Caithness Message Board
Blog(Google) Blog aka Project Diary. 
Last Edited1 Sep 2018

Sub haplogroups/tested lineages/testees