I have an old MacBook Air with Mac OS X Lion 10.7.5 (11G63) software. I'm trying to install the OS X El Capitan, but have problems. At first there was not enough memory on the Mac (even though I deleted everything I can find), so I tried to use several disks that failed for some reason. Then today I got a new external 2T Adata hard drive and now it says
"This disk does not use the GUID partition table scheme." Use the Disk Utility to change the partition scheme, select the disk, select the partition tab, select the volume scheme, and then click Options. "
I go to Disk Utility and the Partition tab and lose myself from here. Choosing this disk also sounds like a desperate situation: "To delete and partition the selected disk, select a layout from the Partition Layout pop-up menu, set the options for each partition and click You can not change the size of the partitions on this disk because the master boot record partitioning scheme is used, this partition can not be changed. "
Just spent a bunch on this hard drive says my other hard drive that it does not work because it is the same hard drive that is used for time machines. Tried another and did not work, I think it was not compatible with apples. Am I just unlucky with hard drives? I've deleted everything I can find on my computer (including Recycle Bin), but it still says I have all those photos, movies, and music somewhere I can not find anywhere. If I had enough space on my empty computer, I would not have to worry about disks … Arggh. I just want to install El Capitan so I can update my Safari or Chrome. So far everything has problems and websites are not working properly.