nvram

  1. R

    MP 1,1-5,1 Boot Rom issue, NVRAM variable removed after reboot, any solution?

    Hi everyone, I would appreciate a bit of a help here. I've a Mac Pro 5.1, and I've recently updated to High Sierra, the problem I'm facing is that the NVRAM variables are removed after restart of the machine. I'm using GTX 980 ti GPU and it was working fine with El Capitan, it should work...
  2. A

    MP 1,1-5,1 Is my BootROM corrupted or valid?

    After having issues with my MP5.1 and it not playing the chime anymore, I followed @tsialex instructions and desoldered the SPI flash, then dumped the BootROM. My plan was to verify and flash the dump or reconstruct if corrupted. I extracted the NVRAM section and it still has SON and UUID...
  3. S

    What are the parameters of nvram by default?

    Can anybody type "nvram -p" in Terminal on new MacBook Air 2018 just to see what is the default parameters, especially if there any string called "AutoBoot" and any parameters for that? Because for now I'm in some experiment with this setting. For example, as you may know, "AutoBoot=%00" turns...
  4. alex1100811

    Mac Pro 5,1 Mojave startup issues (2009 firmware flash)

    I’ll try to explain my situation as the detailed as possible. I have a 2009 4,1 Mac Pro I bought from someone about a month ago. Since purchasing it, I’ve flashed the firmware to 5,1 and began doing hardware upgrades. So far I’ve installed the X5690 Xeon (it’s a single CPU tray version), added...
  5. E

    macOS Mojave stuttering graphics

    I'm running Mojave on a 2018 13" MacBook Pro (2.3GHz i5/16GB) and there's a frequent graphics issue where the whole system stalls every few seconds. Even under low/no load, if I move the cursor around it'll freeze and then jump to another spot ever two or three seconds. If a video's playing...
  6. watkipet

    Can't set efi-boot-device NVRAM variable

    I'm attempting to try out Next Loader. However I've run into a problem with the `bless` command (not with Next Loader itself). `bless` can't seem to change or read the efi-boot-device NVRAM variable. This is on a MacPro4,1 flashed to a 5,1 running macOS 10.13.6 from a SATA SSD formatted as...
  7. loki san hitleson

    MacBook Pro built-in keyboard and trackpad not working, PRAM reset needed

    The keyboard and trackpad of my MacBook Pro 2015 suddenly stopped working. I searched the Internet and did a SMC and PRAM (NVRAM) reset with an external keyboard. The PRAM reset (I reset the PRAM with command+option+P+R as explained here) helped solve the issue: I could use the keyboard and...
  8. E

    startup 2018 Macbook Pro with lid closed on plugging in power?

    I recently switched from a 2017 MBP to the new MBP. I don't quite remember what combination of settings I had on the older MBP, but I used to be able to plug it in (with the lid closed), and it would turn on automatically. I would plug it into a USB-C hub that was connected to power and to an...
  9. Camicia

    MacBook Pro 11,3 retina crashes - NVRAM setting to increase refresh rate?

    It has been happening for 2 months or so. I though it was a heat related problem. I changed the thermal paste on the CPU and GPU. Heat seems to make the crashes more frequent but it happens when it is cold, too. I tried to reinstall the OS. Now it runs a lot cooler but it still freeze every...
  10. dophineh

    cannot reset nvram (dead firmware battery?)

    I have a mid '14 MacBook Pro 15" that will not boot due to a (1) typo I made in the nvram's boot-args, and (2) inability to reset the nvram. I suspect this is because my machine has a dead firmware battery, which it may have always had- I've always noticed that exhausting the main battery would...
  11. M

    WIFI-Trouble after clean reset etc.

    Hello Community, a few days ago I bought an used MacBook Air. Everything's alright so far. After connecting to my Apple AirPort Express I noticed that the Wifi connection is slower than I ever experienced. The Wifi-module must be working as I can connect and use my browser. To open the Apple...
  12. olli321

    How to get rid of rEFIt if you cant boot anymore?

    I have a huge problem after installing rEFIt. After i used the installer and restarted my Mac 10.9.5 wont start again. I know there is the option within safeMode (holding down shift key), but i cant get in to safeMode start up somehow. Even when I inserted a USB drive with the Mac installation...
  13. antron81

    Macbook Pro Internal Keyboard Trackpad not working.

    Hi there, I have been scouring the net for a solution to my issue, and none of the responses have worked so I hoped I might be able to get some new advice. I opened the lid of my A1398 (2012 Macbook Pro 15" Retina, 256gb SSD) this morning and the trackpad and keyboard had stopped working. I...