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What happens if you press alt-key when booting your mac up? It should show all your bootable disks.
 
What happens if you press alt-key when booting your mac up? It should show all your bootable disks.

Oh I mean when I'm already in windows. Previously when my win7 was installed under Mavericks before I upgraded to Yosemite, I can see and access my Mac partition.

But when I did a fresh installation of Yosemite straight up, I dont.
 
You can't access your Mac partition, if you install Mavericks, then Windows 7 and THEN Yosemite on top of an existing Mavericks?
 
You can't access your Mac partition, if you install Mavericks, then Windows 7 and THEN Yosemite on top of an existing Mavericks?
i can access Mac partition if I install Mavericks then windows 7 then Yosemite.

But when I did a clean installation of Yosemite (reformat and install Yosemite straight up) then windows 7, I cant.

Read it's something to do with HFS+ driver being broken by Yosemite?
 
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