Slow boot time on new SSD

Any time you clear NVRAM you need to reset the startup disk, and in your case I would go one step further and do an SMC Reset to insure that the system's NVRAM really "knows" it is an SSD.

TRIM Enabling via 3rd party is likely to cause some issues if/when you install and upgrade to 1010 Yosemite as it stands (some NVRAM changes regarding signed device drivers and extensions being instituted).

I would expect faster boot unless there is an issue with the SSD. I have similar (but not exactly the same) Mac and I do get a faster boot time.

I would boot once into "Safe Mode" which will clear out any kernel related caches. Then boot normally.

NOTE: Safe Mode is typically a slower boot, but if by chance it is faster, that would be a strong indication of 3rd party driver interference, as Safe Mode does not load any 3rd party kernel extensions, launch daemons and agents.

Even if Safe Mode does not boot faster, it could still be a 3rd party extension, so you might want use EtreCheck to see what 3rd party kernel extensions you have installed

<https://discussions.apple.com/docs/DOC-6174>

FYI: TRIM is a way for the file system to tell the SSD that a deleted file's storage may be pre-zeroed by the SSD for future re-use. TRIM should not affect your boot times, as boot is mostly reading, not writing. And even then it should not cause your boot to be 4 times longer than my boot.

I had the same problem with slower or equivalent boot up times with the 850 Evo. Upon start up ,I accessed the Apple HD recover. OS X: About OS X Recovery - Apple Support.

There is an option to select boot from disk. Select your SDD and hit startup.

Now my late 2011 macbook pro boots up with seconds. Good luck

Could it be related to the fact that the SSD is listed as disk two in the EtreCheck report?

NO. The following is "My" SSD information on my Late 2011 Macbook Pro 2.2GHz i7 quad core. It is not much different from yours

Disk Information: ℹ️

Samsung SSD 840 EVO 1TB disk0 : (1 TB)

S.M.A.R.T. Status: Verified

EFI (disk0s1) <not mounted> : 210 MB

Recovery HD (disk0s3) <not mounted> [Recovery]: 2.18 GB

BobBookProSSD (disk1) / [Startup]: 997.21 GB (436.95 GB free)

Encrypted AES-XTS Unlocked

Core Storage: disk0s2 997.55 GB Online

Mine Macbook Pro with SSD, TRIM enabled takes about 12 seconds to boot.

Here is my System Profile Information on my SSD

Intel 6 Series Chipset:

Vendor: Intel

Product: 6 Series Chipset

Link Speed: 6 Gigabit

Negotiated Link Speed: 6 Gigabit

Physical Interconnect: SATA

Description: AHCI Version 1.30 Supported

Samsung SSD 840 EVO 1TB:

Capacity: 1 TB (1,000,204,886,016 bytes)

Model: Samsung SSD 840 EVO 1TB

Revision: EXT0BB6Q

Serial Number: xxxxxxxxxxxxxxx

Native Command Queuing: Yes

Queue Depth: 32

Removable Media: No

Detachable Drive: No

BSD Name: disk0

Medium Type: Solid State

TRIM Support: Yes

Partition Map Type: GPT (GUID Partition Table)

S.M.A.R.T. status: Verified

Volumes:

EFI:

Capacity: 209.7 MB (209,715,200 bytes)

BSD Name: disk0s1

Content: EFI

disk0s2:

Capacity: 997.55 GB (997,549,998,080 bytes)

BSD Name: disk0s2

Content: Apple_CoreStorage

Recovery HD:

Capacity: 2.18 GB (2,176,696,320 bytes)

BSD Name: disk0s3

Content: Apple_Boot

Volume UUID: xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx

Thanks! this worked. I recently installed 850 EVO in my 2011 MBP. I noticed a lag that disappeared after doing the following:

- Shut down the mac

- Press and hold Cmd + R after starting the computer. Hold until internet recovery option appears on the screen.

- Connect to Wifi and let the recovery module load.

- Click the option to select boot disk (top left) and select your MAc partition.

- Problem solved.