External hard drive on read only

Abu Rayane

macrumors member
Original poster
Sep 23, 2014
49
0
Hello everybody,

I would like to use my external HD and it is on read only, how can I change it from the terminal and desktop as well, I then found my Macintosh HD as well on read only
 

simonsi

macrumors 601
Jan 3, 2014
4,850
734
Auckland
Sounds like you are logged in maybe using a guest account with no write permission to the external?

OSX needs to write to the boot drive all the time, it isn't possible for the whole drive to be read-only.
 

Abu Rayane

macrumors member
Original poster
Sep 23, 2014
49
0
I am using the admin account.

Format type for external HD is: NTFS
 
Last edited:

poiihy

macrumors 68020
Aug 22, 2014
2,285
53
So I should copy items from that external HD, format it then I can use it.

Which format type is recommended to use in both sides (MAC and PC)?
ExFat
It works with Windows 7 but not Windows XP
If you want to use with Windows XP you need to use FAT32 (MS-DOS FAT) but this has limitations and is not good for 2TB volume.

This is for a partition itself, not for partition system...
I do not know the partition formats available
 

Abu Rayane

macrumors member
Original poster
Sep 23, 2014
49
0
I have windows Vista, and 2TB external drive, so formatting in FAT will not be the good choice.

Regarding the Macintosh HD, is only one folder inside it which is on read only
 
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