Leaderboard

If you meant my E6230 Catalina guide, it contains a power management SSDT for i7-3540M CPU so you need to delete it and replace it by a table that suits your i5-3340M processor. It clearly says so in the guide. Given that I initially had an E6230 with that very specific i5 CPU, that table is available in the guides I posted for previous OS X/macOS versions up to Mojave but I attach a copy below. Feel free to rename the file as you wish. i5-3340M_ssdt.aml.zip

Without any form of info about what's on your USB device, no possible comment can be made. Boot in verbose mode to see where things hang. You mention Atheros and Intel WWAN but I guess you meant WLAN. That's unlikely to cause a reboot. If in doubt, simply disable WLAN/WWAN in BIOS. Talking of BIOS, do check that the settings are all appropriate (cf. our thread about recommended settings for the E6230). Also make sure you run on the latest version A20. Re: reboot after you've logged in, it may be due to the now-inappropriate CPU power management SSDT. I don't know what bootloader you use but if it's Clover, you may simply drop that add-on table through Clover's main menu at startup (Options->ACPI Patching menu). It'll completely bypass that table and you won't have proper CPU PM but will certainly avoid calling on invalid CPU steps.