bingow wrote:
"dove in and installed new SATA cable this morning, unfortunately with no change in performance. Looks like I'll be looking for a local techie to install a SSD"
If you did this once already, you can replace the SSD yourself.
You've already "broken free" the screws on the back, they'll come out easier a second time.
I suggest you get this enclosure with the SSD:
SABRENT 2.5 Inch SATA to USB 3.0 Tool Free External Hard Drive Enclosure [Optimized for SSD, Support UASP SATA III] Black (EC-UASP)
tinyurl.com
You can use it to "prepare and test" the SSD -BEFORE- you open the MBP again.
This way, if something doesn't go as planned, YOU STILL HAVE A WORKING MBP.
Put the SSD into the enclosure and connect to MBP.
Use disk utility to erase/initialize it for the first time.
At this point, you can either:
a. Use CarbonCopyCloner to clone the contents of the HDD to the SSD (CCC is FREE to use for 30 days)
or
b. Install a completely fresh copy of the OS onto the SSD, then migrate your data.
Then, "do a test boot":
a. power down
b. press power on button and IMMEDIATELY hold down the option key CONTINUOUSLY until the startup manager appears
c. select the SSD with the pointer and hit return.
d. you should boot from the SSD in the external enclosure.
If you get a good boot, and if everything looks ok, now it's time to power down, open up the back, and just "swap drives".
You do have to replace the "bosses" on the side of the HDD, over the SSD.
Then, boot with the option key trick one more time.
Do you get a good boot from the SSD (now inside)?
Fine, go to the startup disk pref pane and set the SSD as the new boot drive.
Finally,
Put the old HDD into the enclosure.
I'd suggest you leave it alone for a week or two, just to be sure the SSD is ok and performs as it should.
Then, you could erase the HDD and use it for external storage, or perhaps a cloned backup of the internal drive.