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Samsung 850 EVO in Early Macbook Pro

Hi,

I had replaced my old hardrive in my Macbook Pro Early 2011 with a samsung 840 EVO, everything worked beautifully until it didnt. In the end i couldent even repair or remformat my drive. So i returned it and got a Samsung 850 EVO instead. In the mean time i put my old HDD back in and everything worked as it should.

Yeasterday i put the replacement SSD Straigt out of the box into the Mac.,I have been trying for 24 hours now, and im not even able to Format the drive using diskutil not from Recovery Mode or from my OSX Install drive. the Drive shows up in Diskutility and is verified as okay. I finanlly got it formated using the terminal, then the OSX installation failed, tried to repair the disk with diskutillity in recovery Mode, and got a message that the GUID Partitiontable was not working, repaired disk and got the message the disk could not be mounted.

Is this simply a hardware error with my mac? could it be I need to replace the SATA Cable?

I managed now to reformatmat my drive disk0 using terminal, when i try to verifyVolume there is a problem with Disk0s2  "errror69845 filesystem verify or reapir failed, underlying errror 8:POSIC Report exec format error

Hi Muldvarp007,

I Just ordered the 850 EVO for my mid 2012 15" Macbook Pro- NON-Retina display. I hope it works with Yosemite. Anyone else out there?

Are you trying to partition your drive to also run windows? Normally when setting up a drive to install Yosemite you would go to disk utilities click on the disk and select erase disk. Then go to partition chose only one partition. select options and choose GUID. Then go back and do the install.You could see if any of this will helpsupport.apple.com/en-us/HT203176https://

I purchased the 850 EVO SSD this week and installed it in my 2011 MacbBook Pro 17".

Note for Time Machine users: I formatted the partition, set it to GUID, then I tried to do a Time Machine restore to the new drive. Unfortunately, the 850 EVO drive would boot halfway then hang. So I read that Time Machine Restore doesn't like new drives, so I went back erased the 850 EVO drive and installed a fresh version of OSX Yosemite from an external USB Flash drive. I was successfully able to boot afterwards, then I used the migration tool to get back up and running. I run my apps and OS Yosemite on the SSD and have another drive for my documents, media, and assets.

The drive is super fast and noticeably so after using an OWC 6G SSD the past three years. Blackmagic Speed Test benchmarked the Read/Write speeds at 500mbps in most tests.

Overall, I am very happy with the Samsung EVO 850 - 250gb. Now if I can just figure out if I should use Trim Enabler or not.

Your drives are most likely working as Samsung intended.  I'm currently upgrading several MacBook Pros for coworkers, and ran into this problem.  It will neither format nor install via the internal SATA.  The workaround is to connect the drive via external USB.  From there you can partition/format/install to the drive.  After you're done, you can install it.

However, if you ever plan to erase & install, you'll have to take it out and connect it externally all over again.

From what I gather, Samsung does have Mac specific firmwares for their 830 and 840 series SSDs.  Descriptions says it addresses compatibility issues, which we're seeing here.  The 850 is brand new, so perhaps they'll release the Mac firmware soon so you don't have to jump through hoops to get it to work.

https://www.samsung.com/global/business/semiconductor/minisite/SSD/us/html/suppor t/downloads.html

Spoke too soon.  Refuses to boot when installed internally, even after formatting & installing over USB.

850 EVO clearly doesn't work with 2012 MacBook Pro, even though they advertise it.

May be a problem with the computer itself.  Worked fine in a unibody white MacBook.

Was Trim setup?

That will cause problems with third-party SSDs and Yosemite

https://www.cindori.org/trim-enabler-and-yosemite/

I managed to track down an identical MacBook Pro.  It was indeed a problem with the one I was working on.  Either the SATA controller or cable is somehow damaged.  The teacher brought it in complaining it was slow, so I took the opportunity to go ahead and upgrade it (it was the first laptop I recieved to upgrade.)  In any event, it didn't work in that laptop.  I put the SSD into the other 2012 MacBook pro and it booted up just fine.  Nice and speedy.  It was even faster after installing the TRIM enabler.

The old laptop even with the original HDD was having problems booting.  So the SSDs appear to be fine.  I was even able to erase the SSD when connected internally on the laptop, which is an improvement over the 840 EVO which wouldn't format no matter what when installed, had to do it over USB.

I’ve replaced quite a few drive cables and I’ve also found more than a few cables barely connected to the logic board. Of course when someone brings their computer to be repaired and you ask, “Have you opened up the computer?” you are almost never going to get the answer “Why yes, and after I couldn’t get the new drive to boot I put the old one back in and it wouldn’t boot either. That’s why I’m here.” Given that, I don’t know if I’m seeing problems that naturally occur or whether there’s been some human intervention. I do know that I damaged a cable and I know what I’m doing so they are somewhat fragile.

I'm having a very similar problem with a samsung 850 evo ssd inside a mid 2012 MacBook Pro running Yosemite public beta. (I understand it could be a beta problem haven't rolled back yet)

i was getting the odd crash and then dreaded white screen telling me I shutdown because of a problem. first time it happened I searched forums and reseated ram. This seemed to work for a short while then back again. It got more and more frequent until yesterday it crashed and then wouldn't boot up.

Went into  to recovery mode to verify disk where it came up with an issue on the samsung. (I have two hard drives installed)  so repaired disk and tried to do a time machine backup. This is when it started rebooting into recovery mode again after about an hour or so (different time every time). I tried removing the original hard drive (which was in the primary slot and moving the ssd from the dvd drive mod into the primary). Still the same problem. I haven't tried any of the suggestions here yet. But I'll let you know how I get on.

Your problem is potentially very different from the original poster's so you should start a new thread with a description of this problem. The use of a data doubler to replace the DVD with another drive may be complicit in your problem.

Hello, I just bought the same SSD and tried to format it using the internal cable, but it failed. I'm curious to see if you've solved your problem?

I read the reply where it says that it can't be done internally, so I'm going to get a SATA-USB cable tonight to try the external format.

If that doesn't work, I guess I'll have to replace the ribbon cable since I've had a similar problem with another brand new SSD which I ended up returning to the shop.

My issue was a bad SATA cable. 

When I connected the SSD externally it worked perfectly.  Ordered a new cable online and I was good to go.

Good luck!

最後更新：2017-08-31 11:01:43

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