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fvbruno

macrumors newbie
Original poster
Aug 9, 2013
11
0
why would my new hard drive not be recognized in my mid20102 macbook pro
 
Er... What type of drive? What is the latest version of OS that you have installed on this machine? Are you able to boot into Recovery Mode or to a bootable external drive?
 
OP:

You're not giving us enough information to help.
What kind of error msg are you getting?
 
ok. update: i used disk utility in recovery mode and i see that the internal drive is recognized by disk utility. but it is read only. im going to try to see how i can get it to write. another thing is that i think it was unmounted. so i mounted it. i guess i will need to format this drive
 
Your new hard drive may have come preformatted with NTFS (if anything) as most people buy hard drives for Windows machines.
 
If you open disk utility and select the new drive,
Can you click the erase button?
If it works, erase the drive to "Mac OS extended with journaling enabled, GUID partition format".

Where is the original drive?
Why did you take it out?
 
Your new hard drive may have come preformatted with NTFS (if anything) as most people buy hard drives for Windows machines.

If you open disk utility and select the new drive,
Can you click the erase button?
If it works, erase the drive to "Mac OS extended with journaling enabled, GUID partition format".

Where is the original drive?
Why did you take it out?
thx Fishrrman. i will look to see if i can erase. the drive says it is "Mac OS extended with journaling enabled". what should i format it as? it is an internal drive. a friend of mine had this problem and im trying to help. but i know i didnt see this drive before and now i do. im not sure if i just seated it better or it was a result of mounting
 
Your new hard drive may have come preformatted with NTFS (if anything) as most people buy hard drives for Windows machines.
i can tell you it says Mac OS extended with journaling enabled for formatting
 
"i can tell you it says Mac OS extended with journaling enabled for formatting"

That sounds like it was formatted for Mac already.
What do you want to DO with this drive?

Do you want to erase it and install a new OS?
Or... something else?
 
"i can tell you it says Mac OS extended with journaling enabled for formatting"

That sounds like it was formatted for Mac already.
What do you want to DO with this drive?

Do you want to erase it and install a new OS?
Or... something else?
i want to make sure it works and really use it as the primary drive. i tried to copy a file to the drive and it didnt work and it seems because it is read only. i dont get why its read only. Thank you
 
"i tried to copy a file to the drive and it didnt work and it seems because it is read only. i dont get why its read only."

I suggest that you open disk utility and erase it.
For erase options, choose:
Mac OS extended with journaling enabled, GUID partition format.

Does it erase?
Does it appear on the desktop after the erase?
Can you now copy a file to it?
 
ok good news. it erased. now it is read/write and i successfully copied a file to the new internal HD. now i would like to install mac os on the new HD and boot off of that instead of the external drive. can i do that by going to Disk utility in Recovery and choosing "reinstall macos" or will that overwrite my bootable external (which of course i do not want). licensed for Catalina. Thank you again
 
You could try this:
1. Boot from the EXTERNAL drive.
2. Download CarbonCopyCloner from here:
3. Use CCC to clone the contents of the EXTERNAL drive to the internal SSD
4. Go to the startup disk preference pane and set the new internal SSD to be the boot drive.
5. Reboot.

That's really all there is to it.
CCC is FREE to download and use for 30 days, this costs you nothing to try.

It's as simple as it gets!
 
You could try this:
1. Boot from the EXTERNAL drive.
2. Download CarbonCopyCloner from here:
3. Use CCC to clone the contents of the EXTERNAL drive to the internal SSD
4. Go to the startup disk preference pane and set the new internal SSD to be the boot drive.
5. Reboot.

That's really all there is to it.
CCC is FREE to download and use for 30 days, this costs you nothing to try.

It's as simple as it gets!
WOW thats great. Thx so much Fishrrman and thx to all who helped here
 
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