In reply to Jade Foulkes:
It's usually possible to find climbing partners these days, but you might have a bit more luck to your specific request if the thread title mentions that you're looking for a partner in Mallorca in June. A tittle like 'How to Find a Climbing Partner in Mallorca in June', where people who might not be looking for a partner but know the answer to your question may notice it, might be even better.
There is also a 'Lift & Partners' forum where your post may get more attention.
I'm sorry for not being more useful, but hopefully, this will help in the long run.
Mehmet