ftechno Posted October 17, 2014 Share Posted October 17, 2014 hi today i have download YOSIMITE from app store. and when i try to install the update in the destination partition section i got This Disque does not use GUID partition table. i have triple boot Windows 8.1 / Mac os 10.9.5 / Ubuntu 14.04 LTS with Chameleon boot loader in MBR partitions table. so how can i update mavericks without harming the others systems ? Link to comment https://www.insanelymac.com/forum/topic/301558-yosemite-update-problem/ Share on other sites More sharing options...
polyzargone Posted October 17, 2014 Share Posted October 17, 2014 You need to apply the MBR patch on your USB Install disk to install Yosemite on an existing MBR partition scheme. Note that if you're using Chameleon, you will not be able to simply launch the Install OS X Yosemite.app from your Applications folder to upgrade the system. You'll have to do a clean install ! Link to comment https://www.insanelymac.com/forum/topic/301558-yosemite-update-problem/#findComment-2070414 Share on other sites More sharing options...
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