tazmarino Posted March 25, 2017 Share Posted March 25, 2017 Hi guys, this is my first try to install Sierra on my Dell Precision m6800, but I can't find a solution to this problem (see the attached screenshot). It appears some minutes after choosing the disk. I tried with both of my two SSD drives, correctly formatted. I don't know how to do to fix this... Can you help me please? Thank you!!! Link to comment Share on other sites More sharing options...
Administrators Bronxteck Posted March 25, 2017 Administrators Share Posted March 25, 2017 use More Reply Options button to attach files. select the file first then press attach tab. is Bios SATA set to AHCI? Link to comment Share on other sites More sharing options...
tazmarino Posted March 27, 2017 Author Share Posted March 27, 2017 Yes, Sata is on AHCI. These are the screenshot of the errors that I get with Sierra and El Capitan installer! Link to comment Share on other sites More sharing options...
Administrators Hervé Posted March 27, 2017 Administrators Share Posted March 27, 2017 installer is clearly complaining about file system format or partitioning size. Try and perform a low-level format from a Windows machine (you can use HDD Low Level Format tool from hddguru.com to that effect - a quick low-level format will suffice), then redo the SSD partitioning (GPT/GUID scheme) + partition formatting (OS X Extended (journaled)) from Disk Utility prior to actual OS installation. Link to comment Share on other sites More sharing options...
tazmarino Posted March 27, 2017 Author Share Posted March 27, 2017 Thanks for your support guys! I solved the problem creating TWO partitions in the same SSD that I was trying to use. BEFORE there was only a 256 GB partition called Macintosh SSD, created with the Erase button in the Disk Utility of the Installer. NOW I created two 128 GB partitions... and it works Link to comment Share on other sites More sharing options...
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