TheGeth Posted May 25, 2015 Share Posted May 25, 2015 Hi, I have OS X installed on my secondary 320GB Hdd(100GB for OS X and 200GB NTFS for data) and now I want to install a Win 10 tech preview on it.I will made a 80GB partition from the 200GB but how it will affect my OS X? PC: Intel Core i3-2100 Asus P8H61-M LE 1x8GB Kingstone Ram Sapphire HD 7750OC 1TB seagate barracuda(305GB for Windows 7, 626GB for data) 320GB western digital(100GB for OS X 10.9.5, 120GB for data, 80GB clean for Win 10 TP) I have a perfectly working OS X 10.9.5 now and I don´t want to destroy it.How can Win 10 installation affect the OS X?Thanks. Link to comment Share on other sites More sharing options...
Allan Posted May 25, 2015 Share Posted May 25, 2015 Hi and Welcome to InsanelyMac Forum! Follow this great guide: http://www.insanelymac.com/forum/topic/303615-guide-install-windows-8-uefi-on-legacy-bios-with-clover-and-dual-boot-with-yosemite/?p=2132772 1 Link to comment Share on other sites More sharing options...
TheGeth Posted May 25, 2015 Author Share Posted May 25, 2015 It looks like it will be much easier to install it on my 1TB drive. Link to comment Share on other sites More sharing options...
fusion71au Posted May 25, 2015 Share Posted May 25, 2015 It certainly is easier and less problematic if you install Windows 10 after Windows 7 on your 1 TB drive and temporarily disconnect your OSX drive until the install is complete (the Windows 10 bootloader is happier being in charge ). This is to avoid Windows setup from installing files on the other hard drive by mistake eg the system partition ---> prevent your OSX drive from booting by itself. If you have installed Windows in legacy mode, you can actually chainload to Clover/Chameleon on your 320GB drive from the Windows bootloader/manager ---> then load OSX: see this guide. Leaving the Windows 10 bootloader in charge on a separate disk will give fewer issues with in place major upgrades of Windows 10 (eg moving from build 10074 to 10122 overwrites the bootsector). 1 Link to comment Share on other sites More sharing options...
TheGeth Posted May 27, 2015 Author Share Posted May 27, 2015 I cant disconnect my HDD because I have important data on it.What problem it will cause if I just install it on a clean partition? Link to comment Share on other sites More sharing options...
TheGeth Posted June 2, 2015 Author Share Posted June 2, 2015 I will be building a new low cost PC so I will put this 320GB HDD inside and install yosemite on it.But I need help with cleaning it from OS X.Last time I used a many softwares but only one did it but I forget his name Link to comment Share on other sites More sharing options...
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