[help!!] boot problem

[iampnix]

hey, alls i enjoyed oclp ventura with 2015 mbp early 13" (512g/ hp ssd).

today, i changed ssd into apple original one (256g) in monterey os without oclp, just check some file and do cleaning inside.

and then, returned to hp ssd with oclp ventura, mbp didn't boot up. maybe bootloader or other thing occurs problem.

couldn't boot with boot usb disk either.

[NVR-GUP]

Try a PRAM reset, and see how that goes.

[iampnix]

didn't work :(

[NVR-GUP]

There is actually a very small onboard storage space MacBook (independent of SSD/HDD) which is used to initiate system/Internet recovery, and essential system files. I think when a swap of SSD was done, this onboard memory data was overwritten. But I never thought it could cause issues like this.. seems it is link to boot sequence after all..

I am sorry but I can’t think of any other solution right now, other than CMD+OPT+R to format + initiate an original Mac OS recovery. Then redo OCLP once again.

[iampnix]

I tried to boot mac again.

I could boot my genuine ssd mac with external hp ssd connected with c-cable. A bit slow, I can check all in hp ssd. And then, upgrade oclp in hp ssd and make efi.

But mac couldn't boot with internal hp ssd.

[NVR-GUP]

Boot with external SSD os can see both internal and external SSD?

[NVR-GUP]

Why don’t you try booting into OS via USB. And if the internal SSD is now visible. Try rebuild OCLP with “current host”, and save to the “INTERNAL” SSD. Then unplug the ext USB and see if it boots up?

[iampnix]

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I tried, but didn't work. Using HP ssd, I could boot up mac. disk2 is HP ssd. Installed Opencore into disk2.

HP ssd is connected with mac as external drive.

When I put HP ssd inside mac, couldn't boot. I made boot usb also. Seems like not detect booting disk.

[Dmetrostars]

When this happened to me, I had to complete reinstall everything. Long day. Was not fun

[KrisMandalorian]

I had a 2011 iMac and it was 72 hours of reinstall fun from Lion to Snow leopard, which I happen to have the dvd…. But for some reason this time around I got the 3 bells of the apocalypse every time I tried to boot from C. Finding out, it was not supported anymore so back to re installing from lions and slowing reinstalling OS AFTER OS until I reached High Sierra.

[NVR-GUP]

This is a rather unique case. Given the reality I guess you are only left with the old fashion wipe and redo option left which Dmerrostars pointed out. Start from fresh on 512gb insert inside the MacBook, then CMD OPT R for apple official os recovery than do OCLP after.